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Field Survey
ChartsStacked areas and maps; the lightness ladder survives greyscale printing.
Click a swatch to copy its hex.
Do not use this for
Brand work — no one colour is allowed to lead.
What was measured
- Closest neighbours
- ΔE00 24.3
- how alike two adjacent swatches look
- Darkest to lightest
- 7.88:1
- WCAG contrast across the set
- Lightness covered
- 48 pts
- of OKLCH lightness, 0–100
- Under colour blindness
- ΔE00 23
- worst under deuteranopia
Every pair here survives protanopia, deuteranopia and tritanopia, so these five can stand for five different things.
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 secondary text and the accent — stated here rather than left for you to discover.
/* Field Survey — Stacked areas and maps; the lightness ladder survives greyscale printing. */
:root {
--palette-1: #530078;Tailwind
// tailwind.config — Field Survey
export default {
theme: {For your coding agent · printed from the colours
Use the Field Survey palette: #530078, #257C3A, #BF6291, #DCAEFE, #2FE69C. It is for this: Stacked areas and maps; the lightness ladder survives greyscale printing.
How this palette was built · no hex was chosen by hand
The catalog states a recipe — series from hue 148 — 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.