#631A05
Closest named color: Reddy Brown (#6E1005). oklch(33.6% 0.109 35.8), rgb(99, 26, 5).
Aa
White text reads best on this color (12.49:1).
About this color
#631A05 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.109 and its hue 36°. 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 12.49:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.109) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.68:1 |
| White text | 12.49:1 |
Values
| HEX | #631A05 |
| RGB | rgb(99, 26, 5) |
| HSL | hsl(13, 90%, 20%) |
| OKLCH | oklch(33.6% 0.109 35.8) |
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 #631A05 | 12.49:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #631A05 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #631A05 text on white | 12.49:1 | AAA | Lc 97.4 | Preferred for body text |
| #631A05 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5CFC5
oklch(88.4% 0.045 35.1)
-
Step 300
300
#F0AE9C
oklch(80.8% 0.082 35.8)
-
Step 400
400
#E68166
oklch(70.8% 0.131 35.9)
-
Step 500
500
#DB5C3A
oklch(63.1% 0.167 35.9)
-
Step 600
600
#C63C12
oklch(55.5% 0.181 35.7)
-
Step 700
700
#AB2D00
oklch(49.1% 0.169 35.9)
-
Step 800
800
#8B2708
oklch(42.7% 0.14 35.8)
-
Step 900
900 (this color)
#631A05
oklch(33.6% 0.109 35.8)
-
Step 950
950
#42170C
oklch(27% 0.07 35.4)
#631A05 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) | #302902 | 0.112 |
| Deuteranopia (no green cones) | #423A01 | 0.102 |
| Tritanopia (no blue cones) | #6E0016 | 0.042 |
| Achromatopsia (no color) | #343434 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631A05
#631A05
oklch(33.6% 0.109 35.8)
- #003E4A
#003E4A
oklch(33.5% 0.059 215.7)
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 #631A05, 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 0.043
- Blood #770001 ΔE 0.046
- Chestnut #742802 ΔE 0.052
- Burgundy #610023 ΔE 0.060
- Maroon #800000 ΔE 0.063
- Wine Red #7B0323 ΔE 0.066
- Bordeaux #7B002C ΔE 0.076
Use #631A05 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.