Submarine
Long sessionsControl-room interfaces that want depth without going fully monochrome.
Click a swatch to copy its hex.
Do not use this for
Health and safety states — the teal reads as calm even at alert.
What was measured
- Closest neighbours
- ΔE00 10.6
- how alike two adjacent swatches look
- Darkest to lightest
- 4.01:1
- WCAG contrast across the set
- Lightness covered
- 34 pts
- of OKLCH lightness, 0–100
- Under colour blindness
- ΔE00 7.6
- worst under deuteranopia
These two are one colour to a reader with deuteranopia. Fine while the set is read as an order; never use them to mean two different things without a label or an icon as well.
A suggested mapping · derived, then measured
Five colours are not an interface, so this is an offer rather than a token set. It does not clear WCAG AA on body text and secondary text and the accent — stated here rather than left for you to discover.
/* Submarine — Control-room interfaces that want depth without going fully monochrome. */
:root {
--palette-1: #012f38;
--palette-2:Tailwind
// tailwind.config — Submarine
export default {
theme: {For your coding agent · printed from the colours
Use the Submarine palette: #012F38, #024847, #00654E, #3E7E47, #7E8D62. It is for this: Control-room interfaces that want depth without going fully monochrome.
How this palette was built · no hex was chosen by hand
The catalog states a recipe — ramp from hue 170 — and the five colours are derived from it in OKLCH, where a step of lightness is a step your eye agrees with rather than one the hex numbers agree with. That is why the numbers above are properties of this palette rather than claims about it.