#31021B
Closest named color: Dark Maroon (#3C0008). oklch(20.9% 0.081 353.2), rgb(49, 2, 27).
Aa
White text reads best on this color (18.18:1).
About this color
#31021B is a very dark, moderately saturated red. In OKLCH its lightness is 21%, its chroma 0.081 and its hue 353°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.045 away. White text reads best on it, at 18.18:1.
| Hue family | Reds |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.15:1 |
| White text | 18.18:1 |
Values
| HEX | #31021B |
| RGB | rgb(49, 2, 27) |
| HSL | hsl(328, 92%, 10%) |
| OKLCH | oklch(20.9% 0.081 353.2) |
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 #31021B | 18.18:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #31021B | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #31021B text on white | 18.18:1 | AAA | Lc 104.2 | Preferred for body text |
| #31021B text on black | 1.15:1 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE3EB
oklch(93.7% 0.027 354.5)
-
Step 200
200
#F7CBDC
oklch(88.5% 0.054 353.1)
-
Step 300
300
#F2A7C6
oklch(80.9% 0.096 353)
-
Step 400
400
#E774A8
oklch(70.6% 0.153 353.3)
-
Step 500
500
#DD4993
oklch(63.2% 0.196 353.4)
-
Step 600
600
#C81F7E
oklch(55.7% 0.213 353.1)
-
Step 700
700
#AC0A6A
oklch(49.1% 0.198 353.1)
-
Step 800
800
#8C1256
oklch(42.7% 0.164 353.4)
-
Step 900
900
#701A47
oklch(37.6% 0.127 353.1)
-
Step 950
950 (this color)
#31021B
oklch(20.9% 0.081 353.2)
#31021B 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) | #0A101C | 0.092 |
| Deuteranopia (no green cones) | #18191A | 0.082 |
| Tritanopia (no blue cones) | #36000D | 0.029 |
| Achromatopsia (no color) | #151515 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31021B
#31021B
oklch(20.9% 0.081 353.2)
- #001E16
#001E16
oklch(20.9% 0.041 172.1)
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 #31021B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.045
- Dark Plum #3F012C ΔE 0.046
- Eggplant #380835 ΔE 0.052
- Aubergine #3D0734 ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.056
- Midnight Purple #280137 ΔE 0.063
- Deep Brown #410200 ΔE 0.064
- Dark Purple #35063E ΔE 0.068
Use #31021B 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.