#831B51
Closest named color: Red Purple (#820747). oklch(41.5% 0.147 354.1), rgb(131, 27, 81).
Aa
White text reads best on this color (9.37:1).
About this color
#831B51 is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.147 and its hue 354°. Its hue sits on the warm side of the wheel. The nearest named color is Red Purple (#820747), ΔE 0.023 away. White text reads best on it, at 9.37:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.147) |
| Temperature | warm |
| Nearest name | Red Purple (#820747) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #831B51 |
| RGB | rgb(131, 27, 81) |
| HSL | hsl(329, 66%, 31%) |
| OKLCH | oklch(41.5% 0.147 354.1) |
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 #831B51 | 9.37:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #831B51 | 2.24:1 | Fails | Lc 13.5 | Not readable |
| #831B51 text on white | 9.37:1 | AAA | Lc 90.4 | Preferred for body text |
| #831B51 text on black | 2.24:1 | Fails | Lc -11.9 | 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
#FCF2F6
oklch(97% 0.012 351)
-
Step 100
100
#F8E3EB
oklch(93.5% 0.025 352.5)
-
Step 200
200
#F4CDDB
oklch(88.5% 0.047 354.5)
-
Step 300
300
#EDAAC4
oklch(80.9% 0.085 354.1)
-
Step 400
400
#E17AA6
oklch(70.7% 0.136 354.1)
-
Step 500
500
#D65390
oklch(63.1% 0.175 354.4)
-
Step 600
600
#C1317B
oklch(55.6% 0.191 353.9)
-
Step 700
700
#A62267
oklch(49.1% 0.177 354.3)
-
Step 800
800 (this color)
#831B51
oklch(41.5% 0.147 354.1)
-
Step 900
900
#6D2146
oklch(37.8% 0.114 353.9)
-
Step 950
950
#401529
oklch(27.1% 0.072 353.9)
#831B51 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) | #303A52 | 0.165 |
| Deuteranopia (no green cones) | #4D4D4F | 0.145 |
| Tritanopia (no blue cones) | #8E0E33 | 0.052 |
| Achromatopsia (no color) | #464646 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #831B51
#831B51
oklch(41.5% 0.147 354.1)
- #005949
#005949
oklch(41.4% 0.078 175)
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 #831B51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Purple #820747 ΔE 0.023
- Mulberry #920A4E ΔE 0.032
- Wine #80013F ΔE 0.034
- Velvet #750851 ΔE 0.043
- Berry #990F4B ΔE 0.047
- Purple Red #990147 ΔE 0.048
- Red Wine #8C0034 ΔE 0.048
- Dark Fuchsia #9D0759 ΔE 0.055
Use #831B51 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.