#631F3E
Closest named color: Merlot (#730039). oklch(35.5% 0.104 355.5), rgb(99, 31, 62).
Aa
White text reads best on this color (11.69:1).
About this color
#631F3E is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.104 and its hue 356°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.044 away. White text reads best on it, at 11.69:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.104) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.79:1 |
| White text | 11.69:1 |
Values
| HEX | #631F3E |
| RGB | rgb(99, 31, 62) |
| HSL | hsl(333, 52%, 25%) |
| OKLCH | oklch(35.5% 0.104 355.5) |
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 #631F3E | 11.69:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #631F3E | 1.79:1 | Fails | Lc 7.7 | Not readable |
| #631F3E text on white | 11.69:1 | AAA | Lc 96.2 | Preferred for body text |
| #631F3E text on black | 1.79:1 | 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
#FCF3F6
oklch(97.2% 0.01 354.9)
-
Step 100
100
#F7E4EA
oklch(93.6% 0.022 356.3)
-
Step 200
200
#F2CEDA
oklch(88.5% 0.043 356)
-
Step 300
300
#EAACC3
oklch(80.9% 0.078 354.9)
-
Step 400
400
#DD7EA4
oklch(70.7% 0.125 355.3)
-
Step 500
500
#D15A8D
oklch(63.2% 0.159 355.8)
-
Step 600
600
#BC3B77
oklch(55.6% 0.173 355.7)
-
Step 700
700
#A12C64
oklch(49% 0.161 355.5)
-
Step 800
800
#832752
oklch(42.7% 0.132 355.5)
-
Step 900
900 (this color)
#631F3E
oklch(35.5% 0.104 355.5)
-
Step 950
950
#3E1728
oklch(27% 0.065 355)
#631F3E 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) | #2A303F | 0.115 |
| Deuteranopia (no green cones) | #3D3D3C | 0.104 |
| Tritanopia (no blue cones) | #6B1A2C | 0.033 |
| Achromatopsia (no color) | #383838 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F3E
#631F3E
oklch(35.5% 0.104 355.5)
- #00473A
#00473A
oklch(35.5% 0.067 175.2)
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 #631F3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.044
- Grape Purple #5D1451 ΔE 0.048
- Burgundy #610023 ΔE 0.054
- Velvet #750851 ΔE 0.057
- Bordeaux #7B002C ΔE 0.059
- Claret #680018 ΔE 0.061
- Wine #80013F ΔE 0.064
- Wine Red #7B0323 ΔE 0.064
Use #631F3E 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.