#631D31
Closest named color: Burgundy (#610023). oklch(34.8% 0.102 6.8), rgb(99, 29, 49).
Aa
White text reads best on this color (11.99:1).
About this color
#631D31 is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.102 and its hue 7°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.041 away. White text reads best on it, at 11.99:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.102) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.75:1 |
| White text | 11.99:1 |
Values
| HEX | #631D31 |
| RGB | rgb(99, 29, 49) |
| HSL | hsl(343, 55%, 25%) |
| OKLCH | oklch(34.8% 0.102 6.8) |
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 #631D31 | 11.99:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #631D31 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #631D31 text on white | 11.99:1 | AAA | Lc 96.7 | Preferred for body text |
| #631D31 text on black | 1.75:1 | 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
#FCF3F4
oklch(97.1% 0.01 9.5)
-
Step 100
100
#F8E4E7
oklch(93.6% 0.022 7.2)
-
Step 200
200
#F3CED4
oklch(88.4% 0.042 7)
-
Step 300
300
#EDACB8
oklch(80.9% 0.078 6.7)
-
Step 400
400
#E07F94
oklch(70.8% 0.121 6.8)
-
Step 500
500
#D45A7A
oklch(63% 0.156 6.4)
-
Step 600
600
#C03B63
oklch(55.6% 0.171 6.5)
-
Step 700
700
#A52C52
oklch(49.1% 0.158 6.5)
-
Step 800
800
#862743
oklch(42.7% 0.13 6.8)
-
Step 900
900 (this color)
#631D31
oklch(34.8% 0.102 6.8)
-
Step 950
950
#401721
oklch(27.1% 0.065 7.2)
#631D31 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) | #2C2E31 | 0.114 |
| Deuteranopia (no green cones) | #3F3C2F | 0.104 |
| Tritanopia (no blue cones) | #6C1225 | 0.026 |
| Achromatopsia (no color) | #363636 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631D31
#631D31
oklch(34.8% 0.102 6.8)
- #00443F
#00443F
oklch(34.8% 0.061 186.5)
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 #631D31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.041
- Claret #680018 ΔE 0.043
- Merlot #730039 ΔE 0.047
- Bordeaux #7B002C ΔE 0.054
- Wine Red #7B0323 ΔE 0.055
- Reddy Brown #6E1005 ΔE 0.055
- Blood #770001 ΔE 0.066
- Grape Purple #5D1451 ΔE 0.066
Use #631D31 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.