#631B1F
Closest named color: Claret (#680018). oklch(34.1% 0.103 21.5), rgb(99, 27, 31).
Aa
White text reads best on this color (12.30:1).
About this color
#631B1F is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.103 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.031 away. White text reads best on it, at 12.30:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.103) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.70:1 |
| White text | 12.30:1 |
Values
| HEX | #631B1F |
| RGB | rgb(99, 27, 31) |
| HSL | hsl(357, 57%, 25%) |
| OKLCH | oklch(34.1% 0.103 21.5) |
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 #631B1F | 12.30:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #631B1F | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #631B1F text on white | 12.30:1 | AAA | Lc 97.2 | Preferred for body text |
| #631B1F text on black | 1.70:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CFCD
oklch(88.6% 0.043 21.6)
-
Step 300
300
#EFADAB
oklch(80.9% 0.078 20.9)
-
Step 400
400
#E37F7E
oklch(70.6% 0.124 21.3)
-
Step 500
500
#D85B5D
oklch(63.1% 0.158 21.8)
-
Step 600
600
#C43C44
oklch(55.7% 0.172 21.6)
-
Step 700
700
#A92C36
oklch(49.2% 0.161 21.3)
-
Step 800
800
#89272D
oklch(42.8% 0.132 21.5)
-
Step 900
900 (this color)
#631B1F
oklch(34.1% 0.103 21.5)
-
Step 950
950
#411718
oklch(27% 0.066 21.1)
#631B1F 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) | #2E2B1F | 0.113 |
| Deuteranopia (no green cones) | #413A1D | 0.102 |
| Tritanopia (no blue cones) | #6D081D | 0.028 |
| Achromatopsia (no color) | #353535 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631B1F
#631B1F
oklch(34.1% 0.103 21.5)
- #004145
#004145
oklch(34.2% 0.058 201.7)
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 #631B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.031
- Reddy Brown #6E1005 ΔE 0.033
- Burgundy #610023 ΔE 0.042
- Blood #770001 ΔE 0.049
- Wine Red #7B0323 ΔE 0.054
- Bordeaux #7B002C ΔE 0.059
- Chestnut #742802 ΔE 0.060
- Merlot #730039 ΔE 0.064
Use #631B1F 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.