#631C75
Closest named color: Grape Purple (#5D1451). oklch(38.2% 0.152 318.6), rgb(99, 28, 117).
Aa
White text reads best on this color (10.74:1).
About this color
#631C75 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.152 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.063 away. White text reads best on it, at 10.74:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #631C75 |
| RGB | rgb(99, 28, 117) |
| HSL | hsl(288, 61%, 28%) |
| OKLCH | oklch(38.2% 0.152 318.6) |
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 #631C75 | 10.74:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #631C75 | 1.95:1 | Fails | Lc 9.9 | Not readable |
| #631C75 text on white | 10.74:1 | AAA | Lc 94.0 | Preferred for body text |
| #631C75 text on black | 1.95:1 | Fails | Lc -8.6 | 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
#FAF2FC
oklch(97% 0.016 319.4)
-
Step 100
100
#F4E3F8
oklch(93.6% 0.033 319.8)
-
Step 200
200
#EBCCF4
oklch(88.4% 0.063 318.6)
-
Step 300
300
#E0A9F0
oklch(80.9% 0.114 318.5)
-
Step 400
400
#CF76E8
oklch(70.6% 0.183 318.5)
-
Step 500
500
#C24AE1
oklch(63.2% 0.233 318.7)
-
Step 600
600
#AD1CCE
oklch(55.5% 0.253 318.7)
-
Step 700
700
#9504B3
oklch(49.2% 0.236 318.7)
-
Step 800
800
#791091
oklch(42.8% 0.195 318.6)
-
Step 900
900 (this color)
#631C75
oklch(38.2% 0.152 318.6)
-
Step 950
950
#391244
oklch(27% 0.096 318)
#631C75 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) | #003977 | 0.147 |
| Deuteranopia (no green cones) | #214073 | 0.131 |
| Tritanopia (no blue cones) | #632E47 | 0.095 |
| Achromatopsia (no color) | #3E3E3E | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631C75
#631C75
oklch(38.2% 0.152 318.6)
- #1A5100
#1A5100
oklch(38.3% 0.12 138.7)
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 #631C75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.063
- Rich Purple #720058 ΔE 0.063
- Purple #800080 ΔE 0.064
- Royal Purple #4B006E ΔE 0.068
- Indigo #4B0082 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.072
- Velvet #750851 ΔE 0.075
- Plum Purple #4E0550 ΔE 0.084
Use #631C75 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.