#631B6C
Closest named color: Grape Purple (#5D1451). oklch(37.5% 0.145 323), rgb(99, 27, 108).
Aa
White text reads best on this color (11.03:1).
About this color
#631B6C is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.145 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 11.03:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #631B6C |
| RGB | rgb(99, 27, 108) |
| HSL | hsl(293, 60%, 26%) |
| OKLCH | oklch(37.5% 0.145 323) |
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 #631B6C | 11.03:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #631B6C | 1.90:1 | Fails | Lc 9.3 | Not readable |
| #631B6C text on white | 11.03:1 | AAA | Lc 94.6 | Preferred for body text |
| #631B6C text on black | 1.90:1 | Fails | Lc -8.0 | 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
#FAF2FB
oklch(97% 0.015 322.3)
-
Step 100
100
#F5E3F6
oklch(93.6% 0.032 324.2)
-
Step 200
200
#EDCCF1
oklch(88.4% 0.061 322.6)
-
Step 300
300
#E3A9E9
oklch(80.9% 0.108 323.3)
-
Step 400
400
#D377DE
oklch(70.7% 0.173 323.2)
-
Step 500
500
#C54CD5
oklch(63.1% 0.222 322.8)
-
Step 600
600
#B122C2
oklch(55.6% 0.241 323.1)
-
Step 700
700
#980EA7
oklch(49.1% 0.224 323.3)
-
Step 800
800
#7B1488
oklch(42.7% 0.186 322.8)
-
Step 900
900 (this color)
#631B6C
oklch(37.5% 0.145 323)
-
Step 950
950
#3B1240
oklch(27.1% 0.093 323.2)
#631B6C 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) | #00376E | 0.151 |
| Deuteranopia (no green cones) | #283F6A | 0.127 |
| Tritanopia (no blue cones) | #652942 | 0.085 |
| Achromatopsia (no color) | #3C3C3C | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631B6C
#631B6C
oklch(37.5% 0.145 323)
- #005004
#005004
oklch(37.4% 0.125 143)
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 #631B6C, 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 0.051
- Velvet #750851 ΔE 0.062
- Royal Purple #4B006E ΔE 0.068
- Purple #800080 ΔE 0.069
- Plum Purple #4E0550 ΔE 0.074
- Indigo #4B0082 ΔE 0.078
- Rebecca Purple #663399 ΔE 0.085
Use #631B6C 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.