Crepuscular as a scale
Eleven steps from #e7dcce, 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 | #fff3e5 | 97.0% | 0.022 | 1.09:1 | 19.22:1 | 0 | — |
| 100 | #f4e9db | 93.8% | 0.022 | 1.20:1 | 17.48:1 | 10 | 2.2 |
| 200 | #dfd4c6 | 87.4% | 0.022 | 1.47:1 | 14.33:1 | 22 | 4.7 |
| 300 | #cabfb1 | 81.0% | 0.022 | 1.81:1 | 11.61:1 | 34 | 5.0 |
| 400 | #b5ab9e | 74.6% | 0.022 | 2.26:1 | 9.28:1 | 45 | 5.5 |
| 500 | #a1978a | 68.2% | 0.022 | 2.87:1 | 7.33:1 | 55 | 6.0 |
| 600 | #8e8477 | 61.8% | 0.022 | 3.68:1 | 5.71:1 | 64 | 6.6 |
| 700 | #7b7165 | 55.4% | 0.022 | 4.78:1 | 4.39:1 | 73 | 7.3 |
| 800 | #685f53 | 49.0% | 0.022 | 6.28:1 | 3.34:1 | 81 | 7.0 |
| 900 | #3f362b | 34.0% | 0.022 | 11.79:1 | 1.78:1 | 97 | 13.8 |
| 950 | #181006 | 18.0% | 0.022 | 18.83:1 | 1.12:1 | 105 | 12.2 |
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 50 to100, at ΔE00 2.2.
- No step had to give up chroma: sRGB has room for this hue at every lightness in the ramp.
- 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 Crepuscular
complement
the hue directly opposite, at the same lightness. #d4dfed (+180°)
analogous
the two neighbours 30° either side. #ecdad2 (+-30°), #e0dfce (+30°)
split complement
the two hues either side of the opposite, 30° apart from it. #cfe1e9 (+150°), #dcdced (+210°)
triad
the circle divided in three. #cee3e2 (+120°), #e3dae8 (+240°)
tetrad
the circle divided in four. #d1e3da (+90°), #d4dfed (+180°), #e9d8e1 (+270°)
The ramp as CSS
:root {
--crepuscular-50: #fff3e5;
--crepuscular-100: #f4e9db;
--crepuscular-200: #dfd4c6;
--crepuscular-300: #cabfb1;
--crepuscular-400: #b5ab9e;
--crepuscular-500: #a1978a;
--crepuscular-600: #8e8477;
--crepuscular-700: #7b7165;
--crepuscular-800: #685f53;
--crepuscular-900: #3f362b;
--crepuscular-950: #181006;
}