#631C74
Closest named color: Grape Purple (#5D1451). oklch(38.2% 0.151 319.1), rgb(99, 28, 116).
Aa
White text reads best on this color (10.77:1).
About this color
#631C74 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.151 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 0.061 away. White text reads best on it, at 10.77:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #631C74 |
| RGB | rgb(99, 28, 116) |
| HSL | hsl(288, 61%, 28%) |
| OKLCH | oklch(38.2% 0.151 319.1) |
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 #631C74 | 10.77:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #631C74 | 1.94:1 | Fails | Lc 9.9 | Not readable |
| #631C74 text on white | 10.77:1 | AAA | Lc 94.0 | Preferred for body text |
| #631C74 text on black | 1.94:1 | Fails | Lc -8.5 | 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
#FAF2FC
oklch(97% 0.016 319.4)
-
Step 100
100
#F4E3F8
oklch(93.6% 0.033 319.8)
-
Step 200
200
#ECCCF4
oklch(88.4% 0.064 319.5)
-
Step 300
300
#E0A9EF
oklch(80.9% 0.113 318.9)
-
Step 400
400
#D076E7
oklch(70.7% 0.182 319.2)
-
Step 500
500
#C24ADF
oklch(63% 0.232 319.2)
-
Step 600
600
#AD1DCD
oklch(55.5% 0.252 318.9)
-
Step 700
700
#9506B1
oklch(49.1% 0.234 319.2)
-
Step 800
800
#791190
oklch(42.8% 0.194 319)
-
Step 900
900 (this color)
#631C74
oklch(38.2% 0.151 319.1)
-
Step 950
950
#391243
oklch(27% 0.095 318.8)
#631C74 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) | #003976 | 0.147 |
| Deuteranopia (no green cones) | #224072 | 0.130 |
| Tritanopia (no blue cones) | #632E46 | 0.095 |
| Achromatopsia (no color) | #3E3E3E | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631C74
#631C74
oklch(38.2% 0.151 319.1)
- #185100
#185100
oklch(38.2% 0.121 139.2)
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 #631C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.061
- Rich Purple #720058 ΔE 0.062
- Purple #800080 ΔE 0.064
- Royal Purple #4B006E ΔE 0.068
- Indigo #4B0082 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.073
- Velvet #750851 ΔE 0.073
- Plum Purple #4E0550 ΔE 0.083
Use #631C74 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.