#831B66
Closest named color: Velvet (#750851). oklch(42.5% 0.158 341.9), rgb(131, 27, 102).
Aa
White text reads best on this color (9.07:1).
About this color
#831B66 is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.158 and its hue 342°. Its hue sits on the warm side of the wheel. The nearest named color is Velvet (#750851), ΔE 0.049 away. White text reads best on it, at 9.07:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Velvet (#750851) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #831B66 |
| RGB | rgb(131, 27, 102) |
| HSL | hsl(317, 66%, 31%) |
| OKLCH | oklch(42.5% 0.158 341.9) |
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 #831B66 | 9.07:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #831B66 | 2.31:1 | Fails | Lc 14.3 | Not readable |
| #831B66 text on white | 9.07:1 | AAA | Lc 89.6 | Fine for body text |
| #831B66 text on black | 2.31:1 | Fails | Lc -12.6 | 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 800.
-
Step 50
50
#FCF2F8
oklch(97.1% 0.013 340.5)
-
Step 100
100
#F7E3EF
oklch(93.5% 0.027 340.9)
-
Step 200
200
#F2CCE3
oklch(88.4% 0.052 341.3)
-
Step 300
300
#EBA9D1
oklch(80.9% 0.093 342.4)
-
Step 400
400
#DE78BA
oklch(70.7% 0.149 342.2)
-
Step 500
500
#D250A9
oklch(63.1% 0.19 342.1)
-
Step 600
600
#BD2D94
oklch(55.7% 0.206 342.2)
-
Step 700
700
#A21D7E
oklch(49.1% 0.191 342)
-
Step 800
800 (this color)
#831B66
oklch(42.5% 0.158 341.9)
-
Step 900
900
#6A1F54
oklch(37.7% 0.123 341.5)
-
Step 950
950
#3F1431
oklch(27.1% 0.078 342.3)
#831B66 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) | #253E68 | 0.177 |
| Deuteranopia (no green cones) | #474F64 | 0.152 |
| Tritanopia (no blue cones) | #8C1D3F | 0.071 |
| Achromatopsia (no color) | #484848 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #831B66
#831B66
oklch(42.5% 0.158 341.9)
- #005E3E
#005E3E
oklch(42.6% 0.094 161.6)
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 #831B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Velvet #750851 ΔE 0.049
- Mulberry #920A4E ΔE 0.051
- Red Purple #820747 ΔE 0.051
- Rich Purple #720058 ΔE 0.053
- Purple #800080 ΔE 0.054
- Red Violet #9E0168 ΔE 0.055
- Dark Fuchsia #9D0759 ΔE 0.059
- Deep Magenta #A0025C ΔE 0.063
Use #831B66 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.