#631F43
Closest named color: Grape Purple (#5D1451). oklch(35.7% 0.106 351.1), rgb(99, 31, 67).
Aa
White text reads best on this color (11.61:1).
About this color
#631F43 is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.106 and its hue 351°. Its hue sits on the warm side of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.041 away. White text reads best on it, at 11.61:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.80:1 |
| White text | 11.61:1 |
Values
| HEX | #631F43 |
| RGB | rgb(99, 31, 67) |
| HSL | hsl(328, 52%, 25%) |
| OKLCH | oklch(35.7% 0.106 351.1) |
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 #631F43 | 11.61:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #631F43 | 1.80:1 | Fails | Lc 7.9 | Not readable |
| #631F43 text on white | 11.61:1 | AAA | Lc 96.0 | Preferred for body text |
| #631F43 text on black | 1.80:1 | 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
#F7E4EC
oklch(93.6% 0.023 350.1)
-
Step 200
200
#F1CEDD
oklch(88.5% 0.044 350.3)
-
Step 300
300
#E9ACC7
oklch(80.9% 0.079 350.8)
-
Step 400
400
#DC7EAA
oklch(70.8% 0.127 351.3)
-
Step 500
500
#CF5995
oklch(63% 0.162 351.1)
-
Step 600
600
#BB3A80
oklch(55.7% 0.178 351)
-
Step 700
700
#A02B6C
oklch(49% 0.165 350.9)
-
Step 800
800
#822658
oklch(42.7% 0.136 350.9)
-
Step 900
900 (this color)
#631F43
oklch(35.7% 0.106 351.1)
-
Step 950
950
#3E162A
oklch(26.9% 0.068 351.4)
#631F43 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) | #293144 | 0.117 |
| Deuteranopia (no green cones) | #3C3D41 | 0.105 |
| Tritanopia (no blue cones) | #6A1B2E | 0.038 |
| Achromatopsia (no color) | #393939 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F43
#631F43
oklch(35.7% 0.106 351.1)
- #004837
#004837
oklch(35.7% 0.07 170.4)
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 #631F43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.041
- Merlot #730039 ΔE 0.044
- Velvet #750851 ΔE 0.051
- Burgundy #610023 ΔE 0.060
- Rich Purple #720058 ΔE 0.060
- Bordeaux #7B002C ΔE 0.063
- Wine #80013F ΔE 0.063
- Red Purple #820747 ΔE 0.067
Use #631F43 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.