diff --git a/frontend/src/components/canvas/__tests__/BaseNode.test.tsx b/frontend/src/components/canvas/__tests__/BaseNode.test.tsx
index 91ec10b..d320d77 100644
--- a/frontend/src/components/canvas/__tests__/BaseNode.test.tsx
+++ b/frontend/src/components/canvas/__tests__/BaseNode.test.tsx
@@ -59,7 +59,10 @@ vi.mock('@/utils/propertyIcons', () => ({
 
 vi.mock('@/utils/handleUtils', () => ({
   bottomHandleId: (idx: number) => idx === 0 ? 'bottom' : `bottom-${idx + 1}`,
-  bottomHandlePositions: () => [50],
+  bottomHandlePositions: (count: number) => {
+    const c = typeof count === 'number' && count > 0 ? Math.floor(count) : 1
+    return Array.from({ length: c }, (_, i) => ((i + 1) * 100) / (c + 1))
+  },
   clampBottomHandles: (n: unknown) => typeof n === 'number' ? n : 1,
 }))
 
@@ -171,6 +174,29 @@ describe('BaseNode — properties rendering', () => {
   })
 })
 
+describe('BaseNode — port numbers (issue #20)', () => {
+  it('renders a number above each bottom handle when show_port_numbers is on', () => {
+    renderBaseNode({ bottom_handles: 4, show_port_numbers: true })
+    expect(screen.getByText('1')).toBeDefined()
+    expect(screen.getByText('2')).toBeDefined()
+    expect(screen.getByText('3')).toBeDefined()
+    expect(screen.getByText('4')).toBeDefined()
+  })
+
+  it('does not render port numbers when show_port_numbers is off', () => {
+    renderBaseNode({ bottom_handles: 4 })
+    expect(screen.queryByText('1')).toBeNull()
+    expect(screen.queryByText('4')).toBeNull()
+  })
+
+  it('numbers match the handle count', () => {
+    renderBaseNode({ bottom_handles: 2, show_port_numbers: true })
+    expect(screen.getByText('1')).toBeDefined()
+    expect(screen.getByText('2')).toBeDefined()
+    expect(screen.queryByText('3')).toBeNull()
+  })
+})
+
 describe('BaseNode — services visibility toggle', () => {
   it('does not render service toggle button on the node', () => {
     renderBaseNode({ services: [{ service_name: 'nginx', port: 80, protocol: 'tcp' }] })
diff --git a/frontend/src/components/canvas/edges/__tests__/edgeTypes.test.ts b/frontend/src/components/canvas/edges/__tests__/edgeTypes.test.ts
new file mode 100644
index 0000000..4d0e354
--- /dev/null
+++ b/frontend/src/components/canvas/edges/__tests__/edgeTypes.test.ts
@@ -0,0 +1,17 @@
+import { describe, it, expect } from 'vitest'
+import { edgeTypes } from '../edgeTypes'
+import { EDGE_TYPE_LABELS, type EdgeType } from '@/types'
+
+describe('edgeTypes registry', () => {
+  // Regression (issue #21): an EdgeType missing here makes React Flow fall back
+  // to its built-in default edge — grey, unstyled, ignoring custom_color.
+  it('registers a component for every EdgeType', () => {
+    for (const type of Object.keys(EDGE_TYPE_LABELS) as EdgeType[]) {
+      expect(edgeTypes[type as keyof typeof edgeTypes]).toBeDefined()
+    }
+  })
+
+  it('registers fibre', () => {
+    expect(edgeTypes.fibre).toBeDefined()
+  })
+})
diff --git a/frontend/src/components/canvas/edges/edgeTypes.ts b/frontend/src/components/canvas/edges/edgeTypes.ts
index da1d29d..ef46d02 100644
--- a/frontend/src/components/canvas/edges/edgeTypes.ts
+++ b/frontend/src/components/canvas/edges/edgeTypes.ts
@@ -7,4 +7,5 @@ export const edgeTypes = {
   vlan: HomelableEdge,
   virtual: HomelableEdge,
   cluster: HomelableEdge,
+  fibre: HomelableEdge,
 }
diff --git a/frontend/src/components/canvas/edges/index.tsx b/frontend/src/components/canvas/edges/index.tsx
index 2a4fb8b..7393905 100644
--- a/frontend/src/components/canvas/edges/index.tsx
+++ b/frontend/src/components/canvas/edges/index.tsx
@@ -323,6 +323,7 @@ export function HomelableEdge({ id, source, target, sourceHandleId, targetHandle
     vlan:     { strokeWidth: 2.5 },
     virtual:  { stroke: edgeColors.virtual,  strokeWidth: 1,   strokeDasharray: '4 4' },
     cluster:  { stroke: edgeColors.cluster,  strokeWidth: 2.5, strokeDasharray: '8 3' },
+    fibre:    { stroke: edgeColors.fibre,    strokeWidth: 2.5, filter: `drop-shadow(0 0 3px ${edgeColors.fibre}aa)` },
   }
 
   const customColor = data?.custom_color as string | undefined
diff --git a/frontend/src/components/canvas/nodes/BaseNode.tsx b/frontend/src/components/canvas/nodes/BaseNode.tsx
index 1c8c398..c65faee 100644
--- a/frontend/src/components/canvas/nodes/BaseNode.tsx
+++ b/frontend/src/components/canvas/nodes/BaseNode.tsx
@@ -254,6 +254,20 @@ export function BaseNode({ id, data, selected, icon: typeIcon, width, height }:
         const targetId = `${sourceId}-t`
         return (
           <span key={sourceId}>
+            {data.show_port_numbers && (
+              <span
+                className="absolute font-mono leading-none pointer-events-none select-none"
+                style={{
+                  left: `${leftPct}%`,
+                  bottom: 3,
+                  transform: 'translateX(-50%)',
+                  fontSize: 7,
+                  color: theme.colors.nodeSubtextColor,
+                }}
+              >
+                {idx + 1}
+              </span>
+            )}
             <Handle
               type="source"
               position={Position.Bottom}
diff --git a/frontend/src/components/modals/CustomStyleModal.tsx b/frontend/src/components/modals/CustomStyleModal.tsx
index 09391a0..a68ff89 100644
--- a/frontend/src/components/modals/CustomStyleModal.tsx
+++ b/frontend/src/components/modals/CustomStyleModal.tsx
@@ -26,7 +26,7 @@ const EDITABLE_NODE_TYPES: NodeType[] = [
   'generic',
 ]
 
-const EDITABLE_EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
+const EDITABLE_EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster', 'fibre']
 
 const NODE_ICONS: Record<string, LucideIcon> = {
   isp: Globe, router: Router, firewall: Flame, switch: Network, server: Server, proxmox: Layers,
diff --git a/frontend/src/components/modals/NodeModal.tsx b/frontend/src/components/modals/NodeModal.tsx
index 274954b..6e96714 100644
--- a/frontend/src/components/modals/NodeModal.tsx
+++ b/frontend/src/components/modals/NodeModal.tsx
@@ -513,6 +513,27 @@ export function NodeModal({ open, onClose, onSubmit, initial, title = 'Add Node'
                   <span>{MIN_BOTTOM_HANDLES}</span>
                   <span>{MAX_BOTTOM_HANDLES}</span>
                 </div>
+                <div className="flex items-center justify-between pt-1">
+                  <div className="flex flex-col gap-0.5">
+                    <Label className="text-xs text-muted-foreground">Show Port Numbers</Label>
+                    <span className="text-[10px] text-muted-foreground/60">Label each bottom connection point</span>
+                  </div>
+                  <button
+                    type="button"
+                    role="switch"
+                    aria-checked={!!form.show_port_numbers}
+                    onClick={() => set('show_port_numbers', !form.show_port_numbers)}
+                    className={`relative inline-flex h-5 w-9 shrink-0 cursor-pointer rounded-full transition-colors focus:outline-none ${modalStyles['modal-interactive']}`}
+                    tabIndex={0}
+                    aria-label="Toggle port numbers"
+                    style={{ background: form.show_port_numbers ? '#ff6e00' : '#30363d' }}
+                  >
+                    <span
+                      className="pointer-events-none absolute top-0.5 h-4 w-4 rounded-full bg-white shadow-sm transition-all"
+                      style={{ left: form.show_port_numbers ? 'calc(100% - 18px)' : '2px' }}
+                    />
+                  </button>
+                </div>
               </div>
             )}
 
diff --git a/frontend/src/components/modals/__tests__/EdgeModal.test.tsx b/frontend/src/components/modals/__tests__/EdgeModal.test.tsx
index 7b97730..c24a0bf 100644
--- a/frontend/src/components/modals/__tests__/EdgeModal.test.tsx
+++ b/frontend/src/components/modals/__tests__/EdgeModal.test.tsx
@@ -59,6 +59,13 @@ describe('EdgeModal', () => {
     expect(onSubmit.mock.calls[0][0].label).toBeUndefined()
   })
 
+  it('round-trips the fibre type through submit (issue #21)', () => {
+    const onSubmit = vi.fn()
+    render(<EdgeModal open onClose={vi.fn()} onSubmit={onSubmit} initial={{ type: 'fibre' }} />)
+    fireEvent.click(screen.getByRole('button', { name: 'Connect' }))
+    expect(onSubmit.mock.calls[0][0].type).toBe('fibre')
+  })
+
   // ── VLAN ID field ─────────────────────────────────────────────────────────
 
   it('does not show VLAN ID field for ethernet type', () => {
diff --git a/frontend/src/components/modals/__tests__/NodeModal.test.tsx b/frontend/src/components/modals/__tests__/NodeModal.test.tsx
index 7319526..1895e49 100644
--- a/frontend/src/components/modals/__tests__/NodeModal.test.tsx
+++ b/frontend/src/components/modals/__tests__/NodeModal.test.tsx
@@ -416,20 +416,30 @@ describe('NodeModal', () => {
     expect((onSubmit.mock.calls[0][0] as Partial<NodeData>).bottom_handles).toBe(12)
   })
 
-  it('supports the full 1..48 range', () => {
+  it('supports the full 1..64 range (issue #20)', () => {
     const { onSubmit } = renderModal({ initial: BASE })
     const slider = screen.getByLabelText('Bottom connection points slider') as HTMLInputElement
     expect(slider.min).toBe('1')
-    expect(slider.max).toBe('48')
-    fireEvent.change(slider, { target: { value: '48' } })
+    expect(slider.max).toBe('64')
+    fireEvent.change(slider, { target: { value: '52' } })
     fireEvent.click(screen.getByRole('button', { name: 'Add' }))
-    expect((onSubmit.mock.calls[0][0] as Partial<NodeData>).bottom_handles).toBe(48)
+    expect((onSubmit.mock.calls[0][0] as Partial<NodeData>).bottom_handles).toBe(52)
   })
 
-  it('clamps pre-filled out-of-range values into [1,48]', () => {
+  it('clamps pre-filled out-of-range values into [1,64]', () => {
     renderModal({ initial: { ...BASE, bottom_handles: 9999 } })
     const slider = screen.getByLabelText('Bottom connection points slider') as HTMLInputElement
-    expect(slider.value).toBe('48')
+    expect(slider.value).toBe('64')
+  })
+
+  it('toggles show_port_numbers and submits it (issue #20)', () => {
+    const { onSubmit } = renderModal({ initial: BASE })
+    const toggle = screen.getByLabelText('Toggle port numbers')
+    expect(toggle.getAttribute('aria-checked')).toBe('false')
+    fireEvent.click(toggle)
+    expect(toggle.getAttribute('aria-checked')).toBe('true')
+    fireEvent.click(screen.getByRole('button', { name: 'Add' }))
+    expect((onSubmit.mock.calls[0][0] as Partial<NodeData>).show_port_numbers).toBe(true)
   })
 
   // ── Zigbee nodes ──────────────────────────────────────────────────────
diff --git a/frontend/src/types/__tests__/types.test.ts b/frontend/src/types/__tests__/types.test.ts
index 0ccf129..3d1965a 100644
--- a/frontend/src/types/__tests__/types.test.ts
+++ b/frontend/src/types/__tests__/types.test.ts
@@ -28,7 +28,7 @@ describe('STATUS_COLORS', () => {
 
 describe('EDGE_TYPE_LABELS', () => {
   it('has an entry for every edge type', () => {
-    const expectedTypes = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
+    const expectedTypes = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster', 'fibre']
     expectedTypes.forEach((t) => {
       expect(EDGE_TYPE_LABELS).toHaveProperty(t)
     })
diff --git a/frontend/src/types/index.ts b/frontend/src/types/index.ts
index 17932b4..a3f7721 100644
--- a/frontend/src/types/index.ts
+++ b/frontend/src/types/index.ts
@@ -37,7 +37,7 @@ export type TextPosition =
   | 'bottom-center'
   | 'bottom-right'
 
-export type EdgeType = 'ethernet' | 'wifi' | 'iot' | 'vlan' | 'virtual' | 'cluster'
+export type EdgeType = 'ethernet' | 'wifi' | 'iot' | 'vlan' | 'virtual' | 'cluster' | 'fibre'
 
 export type NodeStatus = 'online' | 'offline' | 'pending' | 'unknown'
 
@@ -106,8 +106,10 @@ export interface NodeData extends Record<string, unknown> {
    */
   collapsed?: boolean
   custom_icon?: string
-  /** Number of bottom connection points, 1..48. Default 1 (centered). */
+  /** Number of bottom connection points, 1..64. Default 1 (centered). */
   bottom_handles?: number
+  /** Show a port number (1..N) above each bottom connection point. */
+  show_port_numbers?: boolean
   /** Text node content (type === 'text') */
   text_content?: string
 }
@@ -173,6 +175,7 @@ export const EDGE_TYPE_LABELS: Record<EdgeType, string> = {
   vlan: 'VLAN',
   virtual: 'Virtual',
   cluster: 'Cluster',
+  fibre: 'Fibre',
 }
 
 export interface NodeTypeStyle {
diff --git a/frontend/src/utils/__tests__/edgeColors.test.ts b/frontend/src/utils/__tests__/edgeColors.test.ts
index 4ca7cb5..577f518 100644
--- a/frontend/src/utils/__tests__/edgeColors.test.ts
+++ b/frontend/src/utils/__tests__/edgeColors.test.ts
@@ -2,7 +2,7 @@ import { describe, it, expect } from 'vitest'
 import { EDGE_DEFAULT_COLORS } from '../edgeColors'
 import type { EdgeType } from '@/types'
 
-const EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
+const EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster', 'fibre']
 
 describe('EDGE_DEFAULT_COLORS', () => {
   it('has an entry for every EdgeType', () => {
@@ -36,4 +36,8 @@ describe('EDGE_DEFAULT_COLORS', () => {
   it('cluster default is proxmox orange', () => {
     expect(EDGE_DEFAULT_COLORS.cluster).toBe('#ff6e00')
   })
+
+  it('fibre default is bright cyan', () => {
+    expect(EDGE_DEFAULT_COLORS.fibre).toBe('#22d3ee')
+  })
 })
diff --git a/frontend/src/utils/__tests__/exportYaml.test.ts b/frontend/src/utils/__tests__/exportYaml.test.ts
index 870fe44..7348e7e 100644
--- a/frontend/src/utils/__tests__/exportYaml.test.ts
+++ b/frontend/src/utils/__tests__/exportYaml.test.ts
@@ -102,6 +102,15 @@ describe('exportCanvasToYaml', () => {
     expect(entryA).not.toHaveProperty('clusterR')
   })
 
+  it('serializes a fibre edge with linkType "fibre" (issue #21)', () => {
+    const nodeA = makeNode({ label: 'Switch', type: 'switch' }, 'sw')
+    const nodeB = makeNode({ label: 'Server1', type: 'server' }, 's1')
+    const edge = makeEdge('e1', 'sw', 's1', { type: 'fibre', label: 'sfp0' })
+    const result = yaml.load(exportCanvasToYaml([nodeA, nodeB], [edge])) as Record<string, unknown>[]
+    const entryA = result.find((e) => e.label === 'Switch')!
+    expect(entryA.links).toEqual([{ label: 'Server1', linkType: 'fibre', linkLabel: 'sfp0' }])
+  })
+
   it('serializes multiple outgoing edges as links array', () => {
     const sw = makeNode({ label: 'Switch', type: 'switch' }, 'sw')
     const s1 = makeNode({ label: 'Server1', type: 'server' }, 's1')
diff --git a/frontend/src/utils/__tests__/handleUtils.test.ts b/frontend/src/utils/__tests__/handleUtils.test.ts
index 64d25ea..fc9ae6b 100644
--- a/frontend/src/utils/__tests__/handleUtils.test.ts
+++ b/frontend/src/utils/__tests__/handleUtils.test.ts
@@ -29,8 +29,12 @@ describe('clampBottomHandles', () => {
     expect(clampBottomHandles(-5)).toBe(MIN_BOTTOM_HANDLES)
   })
 
+  it('supports at least 52 ports (issue #20 — Cisco 48+4 SFP)', () => {
+    expect(MAX_BOTTOM_HANDLES).toBeGreaterThanOrEqual(52)
+  })
+
   it('clamps above MAX to MAX', () => {
-    expect(clampBottomHandles(49)).toBe(MAX_BOTTOM_HANDLES)
+    expect(clampBottomHandles(65)).toBe(MAX_BOTTOM_HANDLES)
     expect(clampBottomHandles(9999)).toBe(MAX_BOTTOM_HANDLES)
   })
 
@@ -49,6 +53,8 @@ describe('clampBottomHandles', () => {
     expect(clampBottomHandles(1)).toBe(1)
     expect(clampBottomHandles(24)).toBe(24)
     expect(clampBottomHandles(48)).toBe(48)
+    expect(clampBottomHandles(52)).toBe(52)
+    expect(clampBottomHandles(64)).toBe(64)
   })
 })
 
diff --git a/frontend/src/utils/__tests__/importYaml.test.ts b/frontend/src/utils/__tests__/importYaml.test.ts
index 74a385d..27a4e36 100644
--- a/frontend/src/utils/__tests__/importYaml.test.ts
+++ b/frontend/src/utils/__tests__/importYaml.test.ts
@@ -89,6 +89,22 @@ describe('parseYamlToCanvas', () => {
     expect(edges[0].targetHandle).toBe('top-t')
   })
 
+  it('imports a fibre link type onto the edge (issue #21)', () => {
+    const yaml = `
+- nodeType: switch
+  label: "SW"
+  links:
+    - label: "SRV"
+      linkType: fibre
+- nodeType: server
+  label: "SRV"
+`
+    const { edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    expect(edges).toHaveLength(1)
+    expect(edges[0].type).toBe('fibre')
+    expect(edges[0].data?.type).toBe('fibre')
+  })
+
   it('cluster edges have cluster-right→cluster-left handles', () => {
     const yaml = `
 - nodeType: proxmox
diff --git a/frontend/src/utils/__tests__/themes.test.ts b/frontend/src/utils/__tests__/themes.test.ts
index 74e7937..9563a4d 100644
--- a/frontend/src/utils/__tests__/themes.test.ts
+++ b/frontend/src/utils/__tests__/themes.test.ts
@@ -6,7 +6,7 @@ const NODE_TYPES: NodeType[] = [
   'isp', 'router', 'firewall', 'switch', 'server', 'proxmox', 'vm', 'lxc',
   'nas', 'iot', 'ap', 'camera', 'printer', 'computer', 'laptop', 'mobile', 'cpl', 'docker_host', 'docker_container', 'generic', 'groupRect',
 ]
-const EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
+const EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster', 'fibre']
 const STATUS_TYPES: NodeStatus[] = ['online', 'offline', 'pending', 'unknown']
 
 describe('THEME_ORDER', () => {
diff --git a/frontend/src/utils/canvasSerializer.ts b/frontend/src/utils/canvasSerializer.ts
index 435e06b..9e8488e 100644
--- a/frontend/src/utils/canvasSerializer.ts
+++ b/frontend/src/utils/canvasSerializer.ts
@@ -32,6 +32,7 @@ export interface ApiNode extends Record<string, unknown> {
   width?: number | null
   height?: number | null
   bottom_handles?: number
+  show_port_numbers?: boolean
 }
 
 export interface ApiEdge {
@@ -114,6 +115,7 @@ export function serializeNode(n: Node<NodeData>): Record<string, unknown> {
     width: n.measured?.width ?? n.width ?? null,
     height: n.measured?.height ?? n.height ?? null,
     bottom_handles: clampBottomHandles(n.data.bottom_handles ?? 1),
+    show_port_numbers: n.data.show_port_numbers ?? false,
     pos_x: n.position.x,
     pos_y: n.position.y,
   }
diff --git a/frontend/src/utils/edgeColors.ts b/frontend/src/utils/edgeColors.ts
index e395c25..bd3b3d3 100644
--- a/frontend/src/utils/edgeColors.ts
+++ b/frontend/src/utils/edgeColors.ts
@@ -7,4 +7,5 @@ export const EDGE_DEFAULT_COLORS: Record<EdgeType, string> = {
   vlan: '#00d4ff',
   virtual: '#8b949e',
   cluster: '#ff6e00',
+  fibre: '#22d3ee',
 }
diff --git a/frontend/src/utils/handleUtils.ts b/frontend/src/utils/handleUtils.ts
index 0921d0f..7833cb6 100644
--- a/frontend/src/utils/handleUtils.ts
+++ b/frontend/src/utils/handleUtils.ts
@@ -2,14 +2,14 @@
  * Bottom handle configuration for multi-handle nodes.
  *
  * Handle IDs:  index 0 = 'bottom' (always the default, backward-compatible)
- *              index N≥1 = 'bottom-${N+1}'  (so idx 1 = 'bottom-2', idx 47 = 'bottom-48')
+ *              index N≥1 = 'bottom-${N+1}'  (so idx 1 = 'bottom-2', idx 63 = 'bottom-64')
  *
  * Invisible target handles follow the same pattern with a '-t' suffix:
- *   'bottom-t', 'bottom-2-t', ..., 'bottom-48-t'
+ *   'bottom-t', 'bottom-2-t', ..., 'bottom-64-t'
  */
 
 export const MIN_BOTTOM_HANDLES = 1
-export const MAX_BOTTOM_HANDLES = 48
+export const MAX_BOTTOM_HANDLES = 64
 
 /** Returns the source handle ID at a given slot index. */
 export function bottomHandleId(idx: number): string {
diff --git a/frontend/src/utils/themes.ts b/frontend/src/utils/themes.ts
index bce150a..030a698 100644
--- a/frontend/src/utils/themes.ts
+++ b/frontend/src/utils/themes.ts
@@ -86,6 +86,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#00d4ff',
         virtual:  '#8b949e',
         cluster:  '#ff6e00',
+        fibre:    '#22d3ee',
       },
       edgeSelectedColor:  '#00d4ff',
       edgeLabelBackground:'#161b22',
@@ -149,6 +150,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#22d3ee',
         virtual:  '#6b7280',
         cluster:  '#fb923c',
+        fibre:    '#06b6d4',
       },
       edgeSelectedColor:  '#22d3ee',
       edgeLabelBackground:'#111111',
@@ -212,6 +214,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#0284c7',
         virtual:  '#9ca3af',
         cluster:  '#ea580c',
+        fibre:    '#0891b2',
       },
       edgeSelectedColor:  '#0284c7',
       edgeLabelBackground:'#ffffff',
@@ -275,6 +278,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#00ffff',
         virtual:  '#8888cc',
         cluster:  '#ff8800',
+        fibre:    '#00e5ff',
       },
       edgeSelectedColor:  '#00ffff',
       edgeLabelBackground:'#0a0a1a',
@@ -338,6 +342,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#00cc33',
         virtual:  '#004400',
         cluster:  '#33ff66',
+        fibre:    '#00ffcc',
       },
       edgeSelectedColor:  '#00ff41',
       edgeLabelBackground:'#001100',
@@ -401,6 +406,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         vlan:     '#00d4ff',
         virtual:  '#8b949e',
         cluster:  '#ff6e00',
+        fibre:    '#22d3ee',
       },
       edgeSelectedColor:  '#00d4ff',
       edgeLabelBackground:'#161b22',