Diesel as a scale
Eleven steps from #322c2b, 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 | #fbf3f2 | 97.0% | 0.009 | 1.09:1 | 19.20:1 | 0 | — |
| 100 | #f0e8e7 | 93.8% | 0.009 | 1.20:1 | 17.46:1 | 10 | 2.2 |
| 200 | #dbd3d2 | 87.4% | 0.009 | 1.47:1 | 14.31:1 | 22 | 4.7 |
| 300 | #c7bfbd | 81.0% | 0.009 | 1.81:1 | 11.59:1 | 34 | 5.1 |
| 400 | #b2aba9 | 74.6% | 0.009 | 2.26:1 | 9.27:1 | 45 | 5.5 |
| 500 | #9e9796 | 68.2% | 0.009 | 2.87:1 | 7.32:1 | 55 | 6.0 |
| 600 | #8b8482 | 61.8% | 0.009 | 3.68:1 | 5.70:1 | 64 | 6.6 |
| 700 | #787170 | 55.4% | 0.009 | 4.79:1 | 4.38:1 | 73 | 7.3 |
| 800 | #655f5d | 49.0% | 0.009 | 6.29:1 | 3.34:1 | 81 | 7.0 |
| 900 | #3c3635 | 34.0% | 0.009 | 11.80:1 | 1.78:1 | 97 | 13.8 |
| 950 | #15100f | 18.0% | 0.009 | 18.84:1 | 1.11:1 | 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 Diesel
complement
the hue directly opposite, at the same lightness. #292f30 (+180°)
analogous
the two neighbours 30° either side. #322c2d (+-30°), #312d29 (+30°)
split complement
the two hues either side of the opposite, 30° apart from it. #292f2e (+150°), #2a2e32 (+210°)
triad
the circle divided in three. #2b2f2b (+120°), #2c2e32 (+240°)
tetrad
the circle divided in four. #2d2e29 (+90°), #292f30 (+180°), #2e2d32 (+270°)
The ramp as CSS
:root {
--diesel-50: #fbf3f2;
--diesel-100: #f0e8e7;
--diesel-200: #dbd3d2;
--diesel-300: #c7bfbd;
--diesel-400: #b2aba9;
--diesel-500: #9e9796;
--diesel-600: #8b8482;
--diesel-700: #787170;
--diesel-800: #655f5d;
--diesel-900: #3c3635;
--diesel-950: #15100f;
}