#631B61
Closest named color: Grape Purple (#5D1451). oklch(36.8% 0.135 329.1), rgb(99, 27, 97).
Aa
White text reads best on this color (11.29:1).
About this color
#631B61 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.135 and its hue 329°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.031 away. White text reads best on it, at 11.29:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.85:1 |
| White text | 11.29:1 |
Values
| HEX | #631B61 |
| RGB | rgb(99, 27, 97) |
| HSL | hsl(302, 57%, 25%) |
| OKLCH | oklch(36.8% 0.135 329.1) |
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 #631B61 | 11.29:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #631B61 | 1.85:1 | Fails | Lc 8.7 | Not readable |
| #631B61 text on white | 11.29:1 | AAA | Lc 95.2 | Preferred for body text |
| #631B61 text on black | 1.85:1 | Fails | Lc -7.5 | 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
#FBF2FA
oklch(97% 0.014 329.1)
-
Step 100
100
#F6E3F4
oklch(93.6% 0.03 329.1)
-
Step 200
200
#EFCCEC
oklch(88.4% 0.057 328.8)
-
Step 300
300
#E5A9E1
oklch(80.8% 0.101 328.7)
-
Step 400
400
#D678D1
oklch(70.6% 0.161 329.1)
-
Step 500
500
#C94FC5
oklch(63.1% 0.206 329)
-
Step 600
600
#B529B1
oklch(55.6% 0.225 329.4)
-
Step 700
700
#9B1899
oklch(49.1% 0.21 328.9)
-
Step 800
800
#7E197C
oklch(42.7% 0.174 329)
-
Step 900
900 (this color)
#631B61
oklch(36.8% 0.135 329.1)
-
Step 950
950
#3C133A
oklch(27% 0.086 329.6)
#631B61 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) | #123463 | 0.143 |
| Deuteranopia (no green cones) | #2F3E5F | 0.121 |
| Tritanopia (no blue cones) | #67243C | 0.073 |
| Achromatopsia (no color) | #3A3A3A | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631B61
#631B61
oklch(36.8% 0.135 329.1)
- #004D1D
#004D1D
oklch(36.7% 0.104 149)
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 #631B61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.031
- Rich Purple #720058 ΔE 0.041
- Velvet #750851 ΔE 0.049
- Plum Purple #4E0550 ΔE 0.066
- Royal Purple #4B006E ΔE 0.075
- Merlot #730039 ΔE 0.077
- Purple #800080 ΔE 0.079
- Deep Violet #490648 ΔE 0.080
Use #631B61 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.