#37021D
Closest named color: Dark Plum (#3F012C). oklch(22.3% 0.087 355.3), rgb(55, 2, 29).
Aa
White text reads best on this color (17.66:1).
About this color
#37021D is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.087 and its hue 355°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.034 away. White text reads best on it, at 17.66:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.087) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.18:1 |
| White text | 17.66:1 |
Values
| HEX | #37021D |
| RGB | rgb(55, 2, 29) |
| HSL | hsl(329, 93%, 11%) |
| OKLCH | oklch(22.3% 0.087 355.3) |
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 #37021D | 17.66:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #37021D | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #37021D text on white | 17.66:1 | AAA | Lc 103.7 | Preferred for body text |
| #37021D 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
#FBE2EB
oklch(93.6% 0.03 353.9)
-
Step 200
200
#F9CADB
oklch(88.5% 0.057 354.7)
-
Step 300
300
#F6A5C3
oklch(80.9% 0.102 355.8)
-
Step 400
400
#ED6FA5
oklch(70.6% 0.165 355.2)
-
Step 500
500
#E3408F
oklch(63.1% 0.21 355.3)
-
Step 600
600
#CE0079
oklch(55.6% 0.228 355.3)
-
Step 700
700
#AE0066
oklch(49% 0.201 355.1)
-
Step 800
800
#900053
oklch(42.6% 0.175 355.3)
-
Step 900
900
#741345
oklch(37.7% 0.137 355.1)
-
Step 950
950 (this color)
#37021D
oklch(22.3% 0.087 355.3)
#37021D 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) | #0D121E | 0.098 |
| Deuteranopia (no green cones) | #1C1C1C | 0.087 |
| Tritanopia (no blue cones) | #3C000E | 0.030 |
| Achromatopsia (no color) | #191919 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37021D
#37021D
oklch(22.3% 0.087 355.3)
- #00211A
#00211A
oklch(22.1% 0.041 175.7)
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 #37021D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.034
- Dark Maroon #3C0008 ΔE 0.039
- Aubergine #3D0734 ΔE 0.045
- Eggplant #380835 ΔE 0.046
- Deep Brown #410200 ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.061
- Dark Purple #35063E ΔE 0.064
- Deep Purple #36013F ΔE 0.067
Use #37021D 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.