#631B5A
Closest named color: Grape Purple (#5D1451). oklch(36.4% 0.129 333.3), rgb(99, 27, 90).
Aa
White text reads best on this color (11.44:1).
About this color
#631B5A is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.129 and its hue 333°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.023 away. White text reads best on it, at 11.44:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.83:1 |
| White text | 11.44:1 |
Values
| HEX | #631B5A |
| RGB | rgb(99, 27, 90) |
| HSL | hsl(308, 57%, 25%) |
| OKLCH | oklch(36.4% 0.129 333.3) |
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 #631B5A | 11.44:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #631B5A | 1.83:1 | Fails | Lc 8.4 | Not readable |
| #631B5A text on white | 11.44:1 | AAA | Lc 95.5 | Preferred for body text |
| #631B5A text on black | 1.83:1 | 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
#F0CDE8
oklch(88.6% 0.053 334)
-
Step 300
300
#E7A9DB
oklch(80.8% 0.097 333.4)
-
Step 400
400
#D879C9
oklch(70.7% 0.154 333.2)
-
Step 500
500
#CC51BB
oklch(63.2% 0.197 333.4)
-
Step 600
600
#B72DA7
oklch(55.7% 0.215 333.3)
-
Step 700
700
#9D1D8F
oklch(49.1% 0.199 333.3)
-
Step 800
800
#801C74
oklch(42.8% 0.165 333.6)
-
Step 900
900 (this color)
#631B5A
oklch(36.4% 0.129 333.3)
-
Step 950
950
#3D1437
oklch(27.1% 0.082 333.6)
#631B5A 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) | #19335C | 0.138 |
| Deuteranopia (no green cones) | #323D58 | 0.118 |
| Tritanopia (no blue cones) | #682138 | 0.066 |
| Achromatopsia (no color) | #3A3A3A | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631B5A
#631B5A
oklch(36.4% 0.129 333.3)
- #004C25
#004C25
oklch(36.5% 0.094 153)
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 #631B5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.023
- Rich Purple #720058 ΔE 0.038
- Velvet #750851 ΔE 0.043
- Plum Purple #4E0550 ΔE 0.063
- Merlot #730039 ΔE 0.067
- Red Purple #820747 ΔE 0.075
- Deep Violet #490648 ΔE 0.076
- Wine #80013F ΔE 0.078
Use #631B5A 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.