#631A0B
Closest named color: Reddy Brown (#6E1005). oklch(33.7% 0.108 33.3), rgb(99, 26, 11).
Aa
White text reads best on this color (12.47:1).
About this color
#631A0B is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.108 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.025 away. White text reads best on it, at 12.47:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.108) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.68:1 |
| White text | 12.47:1 |
Values
| HEX | #631A0B |
| RGB | rgb(99, 26, 11) |
| HSL | hsl(10, 80%, 22%) |
| OKLCH | oklch(33.7% 0.108 33.3) |
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 #631A0B | 12.47:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #631A0B | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #631A0B text on white | 12.47:1 | AAA | Lc 97.4 | Preferred for body text |
| #631A0B text on black | 1.68:1 | 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 900.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC6
oklch(88.4% 0.045 33.5)
-
Step 300
300
#F0AE9F
oklch(80.9% 0.081 33.2)
-
Step 400
400
#E5806A
oklch(70.6% 0.129 33.3)
-
Step 500
500
#DB5C41
oklch(63.2% 0.165 33.6)
-
Step 600
600
#C63C1F
oklch(55.6% 0.179 33.4)
-
Step 700
700
#AB2C11
oklch(49.1% 0.168 33.2)
-
Step 800
800
#8B2712
oklch(42.8% 0.139 33.4)
-
Step 900
900 (this color)
#631A0B
oklch(33.7% 0.108 33.3)
-
Step 950
950
#42170F
oklch(27% 0.069 32.4)
#631A0B 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) | #302A08 | 0.112 |
| Deuteranopia (no green cones) | #423A07 | 0.102 |
| Tritanopia (no blue cones) | #6E0117 | 0.039 |
| Achromatopsia (no color) | #343434 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631A0B
#631A0B
oklch(33.7% 0.108 33.3)
- #003F49
#003F49
oklch(33.8% 0.059 212.2)
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 #631A0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.025
- Claret #680018 ΔE 0.039
- Blood #770001 ΔE 0.045
- Chestnut #742802 ΔE 0.053
- Burgundy #610023 ΔE 0.056
- Maroon #800000 ΔE 0.062
- Wine Red #7B0323 ΔE 0.064
- Bordeaux #7B002C ΔE 0.073
Use #631A0B 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.