#631F55
Closest named color: Grape Purple (#5D1451). oklch(36.6% 0.119 336.8), rgb(99, 31, 85).
Aa
White text reads best on this color (11.30:1).
About this color
#631F55 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.119 and its hue 337°. Its hue sits on the warm side of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.026 away. White text reads best on it, at 11.30:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.119) |
| Temperature | warm |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #631F55 |
| RGB | rgb(99, 31, 85) |
| HSL | hsl(312, 52%, 25%) |
| OKLCH | oklch(36.6% 0.119 336.8) |
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 #631F55 | 11.30:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #631F55 | 1.85:1 | Fails | Lc 8.5 | Not readable |
| #631F55 text on white | 11.30:1 | AAA | Lc 95.4 | Preferred for body text |
| #631F55 text on black | 1.85:1 | 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
#FBF3F8
oklch(97.2% 0.011 339.3)
-
Step 100
100
#F6E4F0
oklch(93.7% 0.025 337.8)
-
Step 200
200
#EFCDE5
oklch(88.4% 0.049 336.6)
-
Step 300
300
#E6ABD6
oklch(80.9% 0.089 336.5)
-
Step 400
400
#D87BC1
oklch(70.7% 0.144 336.9)
-
Step 500
500
#CB55B1
oklch(63.1% 0.183 337)
-
Step 600
600
#B6359D
oklch(55.7% 0.198 336.8)
-
Step 700
700
#9C2686
oklch(49.1% 0.184 336.8)
-
Step 800
800
#7F226D
oklch(42.8% 0.153 336.8)
-
Step 900
900 (this color)
#631F55
oklch(36.6% 0.119 336.8)
-
Step 950
950
#3C1534
oklch(26.9% 0.076 336.1)
#631F55 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) | #203457 | 0.128 |
| Deuteranopia (no green cones) | #363E53 | 0.111 |
| Tritanopia (no blue cones) | #682237 | 0.057 |
| Achromatopsia (no color) | #3A3A3A | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F55
#631F55
oklch(36.6% 0.119 336.8)
- #004C2B
#004C2B
oklch(36.6% 0.088 156.7)
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 #631F55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.026
- Velvet #750851 ΔE 0.043
- Rich Purple #720058 ΔE 0.043
- Merlot #730039 ΔE 0.061
- Plum Purple #4E0550 ΔE 0.068
- Red Purple #820747 ΔE 0.070
- Wine #80013F ΔE 0.072
- Deep Violet #490648 ΔE 0.079
Use #631F55 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.