Foundation

Colour

One accent, indigo, on warm neutrals. Light and dark follow the system; the band stays indigo in both.

Light

Canvas#F5F3EFPage and slide ground

Ink#141414 · 16.6:1Text, rules

Secondary#5A564F · 6.6:1Labels, numbers, notes

Ghost#8C877E · 3.2:1Display text 48px and up only

Hairline#E0DDD8 · 1.2:1Row dividers; decoration

Indigo#26357A · 10.1:1The one accent: links, buttons, bands, markers

Ratios are against the canvas.

Canvas#121212Page ground

Tile#1E1E1C · 1.1:1Tile and figure ground

Ink#ECEBE7 · 15.7:1Text, rules

Secondary#A8A399 · 7.5:1Labels

Ghost#6B675F · 3.3:1Display text 48px and up only

Hairline#33312E · 1.4:1Row dividers

Link#AAB4F0 · 9.4:1Links, buttons, markers in dark

Ratios are against the dark canvas. Photos dim to 88% in dark mode.

On accent#F7F6FF · 10.5:1Text, links, and labels on indigo

On accent, hover#AAB4F0 · 5.6:1Link hover on indigo; links on the night page

On accent, ghost#7F8BCB · 3.4:1Display text 48px and up on indigo

Ratios are against indigo. The 404 and Blackhole ground is #0A0A0B.

One accent: Indigo is the only colour. No second hue, per page or per product: tried and rejected as a rainbow.
No status colours: No red or green. Use bold, a sign, or a word.
No gradients, no shadows: Depth comes from rules and order, not effects.
Contrast: Text at least 4.5:1; 3:1 for text 24px and up and for meaningful graphics. Ghost colours only for display type.
Higher contrast: prefers-contrast: more turns secondary ink and hairlines into full ink. Forced colours keep every part outlined.
In code: Components use the custom properties at the top of site.css (the same values as tokens/). Known exceptions on the site: .screen ground #e9e6df, .screen-watch black, the band button hover white, and the agent figure’s own palette (documented in its spec). New components add no hard-coded colours.