Cover of Night as a scale
Eleven steps from #494e4f, 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 | #f0f6f8 | 97.0% | 0.007 | 1.09:1 | 19.29:1 | 0 | — |
| 100 | #e6eced | 93.8% | 0.007 | 1.20:1 | 17.54:1 | 10 | 2.2 |
| 200 | #d1d7d8 | 87.4% | 0.007 | 1.46:1 | 14.38:1 | 22 | 4.7 |
| 300 | #bcc2c3 | 81.0% | 0.007 | 1.80:1 | 11.66:1 | 33 | 5.0 |
| 400 | #a8aeaf | 74.6% | 0.007 | 2.25:1 | 9.33:1 | 44 | 5.5 |
| 500 | #949a9b | 68.2% | 0.007 | 2.85:1 | 7.36:1 | 55 | 6.0 |
| 600 | #818788 | 61.8% | 0.007 | 3.66:1 | 5.74:1 | 64 | 6.6 |
| 700 | #6e7475 | 55.4% | 0.007 | 4.76:1 | 4.41:1 | 73 | 7.3 |
| 800 | #5c6162 | 49.0% | 0.007 | 6.24:1 | 3.36:1 | 81 | 7.0 |
| 900 | #34393a | 34.0% | 0.007 | 11.73:1 | 1.79:1 | 97 | 13.8 |
| 950 | #0e1213 | 18.0% | 0.007 | 18.78:1 | 1.12:1 | 105 | 11.9 |
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 Cover of Night
complement
the hue directly opposite, at the same lightness. #514c4b (+180°)
analogous
the two neighbours 30° either side. #494e4d (+-30°), #4a4d50 (+30°)
split complement
the two hues either side of the opposite, 30° apart from it. #504b4d (+150°), #504c49 (+210°)
triad
the circle divided in three. #4f4c4f (+120°), #4e4d49 (+240°)
tetrad
the circle divided in four. #4d4c50 (+90°), #514c4b (+180°), #4c4e4a (+270°)
The ramp as CSS
:root {
--cover-of-night-50: #f0f6f8;
--cover-of-night-100: #e6eced;
--cover-of-night-200: #d1d7d8;
--cover-of-night-300: #bcc2c3;
--cover-of-night-400: #a8aeaf;
--cover-of-night-500: #949a9b;
--cover-of-night-600: #818788;
--cover-of-night-700: #6e7475;
--cover-of-night-800: #5c6162;
--cover-of-night-900: #34393a;
--cover-of-night-950: #0e1213;
}