#631B5C
Closest named color: Grape Purple (#5D1451). oklch(36.5% 0.131 332.1), rgb(99, 27, 92).
Aa
White text reads best on this color (11.40:1).
About this color
#631B5C is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.131 and its hue 332°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.025 away. White text reads best on it, at 11.40:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.84:1 |
| White text | 11.40:1 |
Values
| HEX | #631B5C |
| RGB | rgb(99, 27, 92) |
| HSL | hsl(306, 57%, 25%) |
| OKLCH | oklch(36.5% 0.131 332.1) |
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 #631B5C | 11.40:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #631B5C | 1.84:1 | Fails | Lc 8.5 | Not readable |
| #631B5C text on white | 11.40:1 | AAA | Lc 95.4 | Preferred for body text |
| #631B5C text on black | 1.84:1 | 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
#FBF2F9
oklch(97% 0.013 333)
-
Step 100
100
#F6E3F2
oklch(93.5% 0.029 332.8)
-
Step 200
200
#F0CDE9
oklch(88.6% 0.054 332.9)
-
Step 300
300
#E7A9DD
oklch(80.9% 0.099 332.2)
-
Step 400
400
#D878CB
oklch(70.6% 0.157 332.3)
-
Step 500
500
#CB50BE
oklch(63.1% 0.2 332)
-
Step 600
600
#B62CAA
oklch(55.6% 0.217 332)
-
Step 700
700
#9C1C92
oklch(49.1% 0.202 331.8)
-
Step 800
800
#7F1B76
oklch(42.6% 0.168 332.2)
-
Step 900
900 (this color)
#631B5C
oklch(36.5% 0.131 332.1)
-
Step 950
950
#3C1438
oklch(27% 0.082 331.6)
#631B5C 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) | #17335E | 0.139 |
| Deuteranopia (no green cones) | #313D5A | 0.119 |
| Tritanopia (no blue cones) | #672239 | 0.068 |
| Achromatopsia (no color) | #3A3A3A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631B5C
#631B5C
oklch(36.5% 0.131 332.1)
- #004C23
#004C23
oklch(36.5% 0.096 151.9)
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 #631B5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.025
- Rich Purple #720058 ΔE 0.038
- Velvet #750851 ΔE 0.044
- Plum Purple #4E0550 ΔE 0.064
- Merlot #730039 ΔE 0.070
- Red Purple #820747 ΔE 0.076
- Deep Violet #490648 ΔE 0.077
- Royal Purple #4B006E ΔE 0.079
Use #631B5C 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.