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Cathode Signal

A luminous CRT signal palette — cyan and magenta phosphor over near-black. Glow is liveness.

cool, cyan.

Download .css

Colours

3 signature colours, 5 neutrals, 4 semantic.

Signature

Cyan / live#00E7FF
Magenta / focus#FF2BD6
Mint / ready#3BFFB0

Neutrals

bg#050509
surface#0B0D16
text#F1F7FF
muted#818FA8
bordertransparent

Semantic

success#3BFFB0
warning#FFD166
error#FF4D6D
info#66A3FF

crt, neon, cyan-magenta, dark, glow, phosphor, high-contrast

Using it

Do

  • Keep the field near-black; let glow mean liveness
  • Cyan = live, magenta = command focus, mint = ready
  • Reserve red/amber for genuine alert states

Avoid

  • No pastel washes or gradients
  • No magenta as a default fill — it means focus
  • No light backgrounds; dark mode is the point

Try a remix

Drop Cathode Signal onto any UI language and swap the art style. The preview recolours live.

UI language
Palette
Cathode Signal
Art style