#37031A
Closest named color: Dark Maroon (#3C0008). oklch(22.3% 0.084 359.5), rgb(55, 3, 26).
Aa
White text reads best on this color (17.64:1).
About this color
#37031A is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.084 and its hue 359°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.033 away. White text reads best on it, at 17.64:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.084) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.19:1 |
| White text | 17.64:1 |
Values
| HEX | #37031A |
| RGB | rgb(55, 3, 26) |
| HSL | hsl(333, 90%, 11%) |
| OKLCH | oklch(22.3% 0.084 359.5) |
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 #37031A | 17.64:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #37031A | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #37031A text on white | 17.64:1 | AAA | Lc 103.7 | Preferred for body text |
| #37031A text on black | 1.19:1 | 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
#FEF2F5
oklch(97.1% 0.013 0.3)
-
Step 100
100
#FBE2E9
oklch(93.5% 0.029 358.8)
-
Step 200
200
#F9CBD8
oklch(88.6% 0.054 359.5)
-
Step 300
300
#F6A6BE
oklch(80.9% 0.099 0)
-
Step 400
400
#ED719D
oklch(70.6% 0.159 359.6)
-
Step 500
500
#E34386
oklch(63.1% 0.203 359.3)
-
Step 600
600
#CE0F6F
oklch(55.6% 0.22 359.5)
-
Step 700
700
#B0005D
oklch(49.1% 0.199 359.5)
-
Step 800
800
#90064C
oklch(42.6% 0.169 359.4)
-
Step 900
900
#74163F
oklch(37.7% 0.132 359.7)
-
Step 950
950 (this color)
#37031A
oklch(22.3% 0.084 359.5)
#37031A 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) | #0F121B | 0.094 |
| Deuteranopia (no green cones) | #1D1C19 | 0.084 |
| Tritanopia (no blue cones) | #3D000D | 0.027 |
| Achromatopsia (no color) | #191919 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37031A
#37031A
oklch(22.3% 0.084 359.5)
- #00211C
#00211C
oklch(22.2% 0.04 180.8)
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 #37031A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.033
- Dark Plum #3F012C ΔE 0.039
- Aubergine #3D0734 ΔE 0.050
- Deep Brown #410200 ΔE 0.051
- Eggplant #380835 ΔE 0.051
- Mahogany #4A0100 ΔE 0.063
- Very Dark Purple #2A0134 ΔE 0.066
- Dark Purple #35063E ΔE 0.070
Use #37031A 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.