#631F6B
Closest named color: Grape Purple (#5D1451). oklch(37.9% 0.139 323.3), rgb(99, 31, 107).
Aa
White text reads best on this color (10.83:1).
About this color
#631F6B is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.139 and its hue 323°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.048 away. White text reads best on it, at 10.83:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #631F6B |
| RGB | rgb(99, 31, 107) |
| HSL | hsl(294, 55%, 27%) |
| OKLCH | oklch(37.9% 0.139 323.3) |
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 #631F6B | 10.83:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #631F6B | 1.93:1 | Fails | Lc 9.6 | Not readable |
| #631F6B text on white | 10.83:1 | AAA | Lc 94.3 | Preferred for body text |
| #631F6B text on black | 1.93:1 | Fails | Lc -8.3 | 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
#FAF2FB
oklch(97% 0.015 322.3)
-
Step 100
100
#F4E4F6
oklch(93.7% 0.029 322.4)
-
Step 200
200
#ECCDEF
oklch(88.5% 0.057 323.3)
-
Step 300
300
#E2AAE7
oklch(80.9% 0.104 323.7)
-
Step 400
400
#D179DB
oklch(70.7% 0.166 323.3)
-
Step 500
500
#C450D1
oklch(63.1% 0.212 323.5)
-
Step 600
600
#AF2ABE
oklch(55.6% 0.231 323.4)
-
Step 700
700
#9619A4
oklch(49.1% 0.215 323.3)
-
Step 800
800
#7A1A85
oklch(42.7% 0.178 323.3)
-
Step 900
900 (this color)
#631F6B
oklch(37.9% 0.139 323.3)
-
Step 950
950
#3A143E
oklch(27% 0.087 323.8)
#631F6B 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) | #0B386D | 0.142 |
| Deuteranopia (no green cones) | #2B4069 | 0.121 |
| Tritanopia (no blue cones) | #652C42 | 0.083 |
| Achromatopsia (no color) | #3D3D3D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F6B
#631F6B
oklch(37.9% 0.139 323.3)
- #005106
#005106
oklch(37.7% 0.125 143.3)
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 #631F6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.048
- Rich Purple #720058 ΔE 0.052
- Velvet #750851 ΔE 0.061
- Purple #800080 ΔE 0.071
- Royal Purple #4B006E ΔE 0.073
- Plum Purple #4E0550 ΔE 0.077
- Indigo #4B0082 ΔE 0.082
- Rebecca Purple #663399 ΔE 0.083
Use #631F6B 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.