#37021C
Closest named color: Dark Plum (#3F012C). oklch(22.2% 0.086 356.5), rgb(55, 2, 28).
Aa
White text reads best on this color (17.67:1).
About this color
#37021C is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.086 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.035 away. White text reads best on it, at 17.67:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.18:1 |
| White text | 17.67:1 |
Values
| HEX | #37021C |
| RGB | rgb(55, 2, 28) |
| HSL | hsl(331, 93%, 11%) |
| OKLCH | oklch(22.2% 0.086 356.5) |
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 #37021C | 17.67:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #37021C | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #37021C text on white | 17.67:1 | AAA | Lc 103.7 | Preferred for body text |
| #37021C text on black | 1.18:1 | 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
#FEF2F6
oklch(97.2% 0.014 355)
-
Step 100
100
#FBE2EA
oklch(93.5% 0.029 356.3)
-
Step 200
200
#F9CADA
oklch(88.4% 0.057 355.9)
-
Step 300
300
#F6A5C2
oklch(80.9% 0.102 356.5)
-
Step 400
400
#ED70A3
oklch(70.7% 0.163 356.4)
-
Step 500
500
#E4408C
oklch(63.2% 0.209 356.7)
-
Step 600
600
#CF0076
oklch(55.6% 0.227 356.7)
-
Step 700
700
#AF0063
oklch(49.1% 0.201 356.6)
-
Step 800
800
#910051
oklch(42.8% 0.175 356.7)
-
Step 900
900
#741343
oklch(37.6% 0.136 356.4)
-
Step 950
950 (this color)
#37021C
oklch(22.2% 0.086 356.5)
#37021C 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) | #0D121D | 0.098 |
| Deuteranopia (no green cones) | #1C1C1B | 0.087 |
| Tritanopia (no blue cones) | #3C000D | 0.030 |
| Achromatopsia (no color) | #181818 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37021C
#37021C
oklch(22.2% 0.086 356.5)
- #00211B
#00211B
oklch(22.2% 0.041 178.2)
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 #37021C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.035
- Dark Maroon #3C0008 ΔE 0.037
- Aubergine #3D0734 ΔE 0.047
- Eggplant #380835 ΔE 0.048
- Deep Brown #410200 ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.062
- Dark Purple #35063E ΔE 0.066
- Mahogany #4A0100 ΔE 0.067
Use #37021C 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.