Sea Letter
ReadingTravel essays and correspondence: deep sea ink on pale paper, with one warm ochre for marks in the margin.
Click a swatch to copy its hex.
Do not use this for
Data graphics — only the ochre carries emphasis, so no two series stand apart.
What was measured
- Closest neighbours
- ΔE00 21.5
- how alike two adjacent swatches look
- Darkest to lightest
- 5.64:1
- WCAG contrast across the set
- Lightness covered
- 65 pts
- of OKLCH lightness, 0–100
- Under colour blindness
- ΔE00 9.4
- worst under protanopia
These two are one colour to a reader with protanopia. 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 clears WCAG AA as it stands.
/* Sea Letter — Travel essays and correspondence: deep sea ink on pale paper, with one warm ochre for marks in the margin. */
Tailwind
// tailwind.config — Sea Letter
export default {
theme: {For your coding agent · printed from the colours
Use the Sea Letter palette: #003636, #037879, #F9F0DA, #4E2A24, #C7A099. It is for this: Travel essays and correspondence: deep sea ink on pale paper, with one warm ochre for marks in the margin.
How this palette was built · no hex was chosen by hand
The catalog states a recipe — scene from hue 196 and 30 — 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.