#37031E
Closest named color: Dark Plum (#3F012C). oklch(22.5% 0.086 354.5), rgb(55, 3, 30).
Aa
White text reads best on this color (17.58:1).
About this color
#37031E is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.086 and its hue 354°. 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 17.58:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.19:1 |
| White text | 17.58:1 |
Values
| HEX | #37031E |
| RGB | rgb(55, 3, 30) |
| HSL | hsl(329, 90%, 11%) |
| OKLCH | oklch(22.5% 0.086 354.5) |
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 #37031E | 17.58:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #37031E | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #37031E text on white | 17.58:1 | AAA | Lc 103.7 | Preferred for body text |
| #37031E 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
#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
#F5A5C4
oklch(80.8% 0.102 354.7)
-
Step 400
400
#EC71A7
oklch(70.8% 0.162 354.4)
-
Step 500
500
#E14291
oklch(63% 0.207 354.3)
-
Step 600
600
#CD0A7B
oklch(55.7% 0.225 354.6)
-
Step 700
700
#AE0067
oklch(49.1% 0.202 354.6)
-
Step 800
800
#8F0455
oklch(42.7% 0.173 354.2)
-
Step 900
900
#731546
oklch(37.7% 0.135 354.2)
-
Step 950
950 (this color)
#37031E
oklch(22.5% 0.086 354.5)
#37031E 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) | #0D131F | 0.097 |
| Deuteranopia (no green cones) | #1C1C1D | 0.085 |
| Tritanopia (no blue cones) | #3C000F | 0.030 |
| Achromatopsia (no color) | #191919 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37031E
#37031E
oklch(22.5% 0.086 354.5)
- #00221A
#00221A
oklch(22.5% 0.043 173.7)
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 #37031E, 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 0.040
- Aubergine #3D0734 ΔE 0.043
- Eggplant #380835 ΔE 0.044
- Deep Brown #410200 ΔE 0.058
- Very Dark Purple #2A0134 ΔE 0.060
- Dark Purple #35063E ΔE 0.062
- Deep Purple #36013F ΔE 0.065
Use #37031E 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.