#631D3C
Closest named color: Merlot (#730039). oklch(35.2% 0.106 356.7), rgb(99, 29, 60).
Aa
White text reads best on this color (11.85:1).
About this color
#631D3C is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.106 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.042 away. White text reads best on it, at 11.85:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.77:1 |
| White text | 11.85:1 |
Values
| HEX | #631D3C |
| RGB | rgb(99, 29, 60) |
| HSL | hsl(333, 55%, 25%) |
| OKLCH | oklch(35.2% 0.106 356.7) |
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 #631D3C | 11.85:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #631D3C | 1.77:1 | Fails | Lc 7.5 | Not readable |
| #631D3C text on white | 11.85:1 | AAA | Lc 96.4 | Preferred for body text |
| #631D3C text on black | 1.77:1 | 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
#FCF3F5
oklch(97.2% 0.01 2)
-
Step 100
100
#F8E4EA
oklch(93.7% 0.023 357.4)
-
Step 200
200
#F3CEDA
oklch(88.6% 0.044 356.5)
-
Step 300
300
#EBACC1
oklch(80.9% 0.078 357.2)
-
Step 400
400
#DE7DA2
oklch(70.6% 0.127 356.5)
-
Step 500
500
#D2588B
oklch(63% 0.162 356.7)
-
Step 600
600
#BD3975
oklch(55.5% 0.176 356.7)
-
Step 700
700
#A32A62
oklch(49.1% 0.164 356.9)
-
Step 800
800
#842550
oklch(42.6% 0.135 356.8)
-
Step 900
900 (this color)
#631D3C
oklch(35.2% 0.106 356.7)
-
Step 950
950
#3F1627
oklch(27% 0.068 356.6)
#631D3C 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) | #2A2F3D | 0.117 |
| Deuteranopia (no green cones) | #3D3C3A | 0.106 |
| Tritanopia (no blue cones) | #6B172A | 0.033 |
| Achromatopsia (no color) | #373737 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631D3C
#631D3C
oklch(35.2% 0.106 356.7)
- #00463A
#00463A
oklch(35.2% 0.066 176.4)
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 #631D3C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.042
- Grape Purple #5D1451 ΔE 0.049
- Burgundy #610023 ΔE 0.049
- Bordeaux #7B002C ΔE 0.057
- Claret #680018 ΔE 0.057
- Velvet #750851 ΔE 0.058
- Wine Red #7B0323 ΔE 0.063
- Wine #80013F ΔE 0.063
Use #631D3C 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.