#631F74
Closest named color: Grape Purple (#5D1451). oklch(38.5% 0.147 318.8), rgb(99, 31, 116).
Aa
White text reads best on this color (10.61:1).
About this color
#631F74 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.147 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 0.062 away. White text reads best on it, at 10.61:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #631F74 |
| RGB | rgb(99, 31, 116) |
| HSL | hsl(288, 58%, 29%) |
| OKLCH | oklch(38.5% 0.147 318.8) |
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 #631F74 | 10.61:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #631F74 | 1.97:1 | Fails | Lc 10.1 | Not readable |
| #631F74 text on white | 10.61:1 | AAA | Lc 93.8 | Preferred for body text |
| #631F74 text on black | 1.97:1 | Fails | Lc -8.7 | 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
#F3E4F8
oklch(93.7% 0.031 317.7)
-
Step 200
200
#EBCDF3
oklch(88.5% 0.061 319.1)
-
Step 300
300
#DFAAEE
oklch(80.9% 0.109 318.7)
-
Step 400
400
#CE78E6
oklch(70.7% 0.177 318.6)
-
Step 500
500
#C04DDE
oklch(63% 0.226 318.7)
-
Step 600
600
#AC24CB
oklch(55.6% 0.245 318.9)
-
Step 700
700
#9310B0
oklch(49% 0.228 318.6)
-
Step 800
800
#78158E
oklch(42.7% 0.189 319.1)
-
Step 900
900 (this color)
#631F74
oklch(38.5% 0.147 318.8)
-
Step 950
950
#391343
oklch(27.1% 0.093 318.7)
#631F74 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) | #003A76 | 0.145 |
| Deuteranopia (no green cones) | #244172 | 0.126 |
| Tritanopia (no blue cones) | #632F47 | 0.092 |
| Achromatopsia (no color) | #3F3F3F | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F74
#631F74
oklch(38.5% 0.147 318.8)
- #1A5200
#1A5200
oklch(38.6% 0.121 138.8)
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 #631F74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.062
- Rich Purple #720058 ΔE 0.063
- Purple #800080 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.070
- Royal Purple #4B006E ΔE 0.071
- Velvet #750851 ΔE 0.073
- Indigo #4B0082 ΔE 0.074
- Dark Slate Blue #483D8B ΔE 0.085
Use #631F74 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.