Belladonna as a scale
Eleven steps from #220011, built by moving lightness in OKLCh and keeping the hue where it is. Every step is gamut-mapped by giving up chroma, never by clipping channels — clipping is what turns a light blue purple.
| Stop | Hex | OKLCh L | Chroma | On white | On black | APCA on white | ΔE00 from the step above |
|---|---|---|---|---|---|---|---|
| 50 | #fff1f6 | 97.0% | 0.017 ·capped | 1.10:1 | 19.13:1 | 0 | — |
| 100 | #ffe1ed | 93.8% | 0.036 ·capped | 1.22:1 | 17.26:1 | 11 | 6.4 |
| 200 | #fac4da | 87.4% | 0.068 | 1.50:1 | 13.95:1 | 24 | 8.7 |
| 300 | #e5afc5 | 81.0% | 0.068 | 1.86:1 | 11.29:1 | 35 | 5.1 |
| 400 | #d09bb1 | 74.6% | 0.068 | 2.33:1 | 9.01:1 | 46 | 5.5 |
| 500 | #bb889d | 68.2% | 0.068 | 2.96:1 | 7.10:1 | 56 | 6.0 |
| 600 | #a67589 | 61.8% | 0.068 | 3.80:1 | 5.52:1 | 65 | 6.7 |
| 700 | #926276 | 55.4% | 0.068 | 4.95:1 | 4.24:1 | 74 | 7.4 |
| 800 | #7f5064 | 49.0% | 0.068 | 6.51:1 | 3.23:1 | 82 | 6.9 |
| 900 | #52283b | 34.0% | 0.068 | 12.17:1 | 1.73:1 | 98 | 13.7 |
| 950 | #260214 | 18.0% | 0.068 | 19.09:1 | 1.10:1 | 105 | 11.8 |
What is true of this ramp
- 10 of the 10 adjacent pairs differ by ΔE00 2 or more. Every step here is a step a reader can see.
- The tightest pair is 200 to300, at ΔE00 5.1.
- 2 steps had to give up chroma to stay inside sRGB — 50, 100. A wider display would show them more vividly.
- 4 steps clear 4.5:1 on white (700, 800, 900, 950), and 7 on black (50, 100, 200, 300, 400, 500, 600).
Harmonies from Belladonna
complement
the hue directly opposite, at the same lightness. #00130d (+180°) — chroma capped by sRGB.
analogous
the two neighbours 30° either side. #1b021f (+-30°), #240002 (+30°) — chroma capped by sRGB.
split complement
the two hues either side of the opposite, 30° apart from it. #001400 (+150°), #001214 (+210°) — chroma capped by sRGB.
triad
the circle divided in three. #0f1000 (+120°), #00111b (+240°) — chroma capped by sRGB.
tetrad
the circle divided in four. #150d00 (+90°), #00130d (+180°), #010b2b (+270°) — chroma capped by sRGB.
The ramp as CSS
:root {
--belladonna-50: #fff1f6;
--belladonna-100: #ffe1ed;
--belladonna-200: #fac4da;
--belladonna-300: #e5afc5;
--belladonna-400: #d09bb1;
--belladonna-500: #bb889d;
--belladonna-600: #a67589;
--belladonna-700: #926276;
--belladonna-800: #7f5064;
--belladonna-900: #52283b;
--belladonna-950: #260214;
}