#42021D
Closest named color: Dark Plum (#3F012C). oklch(24.7% 0.096 2.4), rgb(66, 2, 29).
Aa
White text reads best on this color (16.69:1).
About this color
#42021D is a very dark, moderately saturated red. In OKLCH its lightness is 25%, its chroma 0.096 and its hue 2°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.032 away. White text reads best on it, at 16.69:1.
| Hue family | Reds |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.096) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.25:1 |
| White text | 16.69:1 |
Values
| HEX | #42021D |
| RGB | rgb(66, 2, 29) |
| HSL | hsl(335, 94%, 13%) |
| OKLCH | oklch(24.7% 0.096 2.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #42021D | 16.69:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #42021D | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #42021D text on white | 16.69:1 | AAA | Lc 102.6 | Preferred for body text |
| #42021D text on black | 1.25:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#FFF1F4
oklch(97% 0.016 2.7)
-
Step 100
100
#FEE1E8
oklch(93.5% 0.033 1.4)
-
Step 200
200
#FEC8D5
oklch(88.4% 0.063 2.4)
-
Step 300
300
#FEA1BA
oklch(80.9% 0.114 2.5)
-
Step 400
400
#F86797
oklch(70.7% 0.182 2.3)
-
Step 500
500
#F02B7D
oklch(63.2% 0.232 2.6)
-
Step 600
600
#D10068
oklch(55.6% 0.224 2.4)
-
Step 700
700
#B10057
oklch(49.1% 0.198 2.4)
-
Step 800
800
#920047
oklch(42.6% 0.172 2.2)
-
Step 900
900
#7B013B
oklch(37.7% 0.151 2.1)
-
Step 950
950 (this color)
#42021D
oklch(24.7% 0.096 2.4)
#42021D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #13161E | 0.109 |
| Deuteranopia (no green cones) | #24221C | 0.097 |
| Tritanopia (no blue cones) | #49000E | 0.031 |
| Achromatopsia (no color) | #1E1E1E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42021D
#42021D
oklch(24.7% 0.096 2.4)
- #002823
#002823
oklch(24.8% 0.044 182.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #42021D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.032
- Dark Maroon #3C0008 ΔE 0.037
- Aubergine #3D0734 ΔE 0.045
- Deep Brown #410200 ΔE 0.047
- Mahogany #4A0100 ΔE 0.049
- Eggplant #380835 ΔE 0.052
- Eggplant Purple #430541 ΔE 0.067
- Dark Purple #35063E ΔE 0.072
Use #42021D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.