#831B25
Closest named color: Dark Red (#8B0000). oklch(40.3% 0.138 21.3), rgb(131, 27, 37).
Aa
White text reads best on this color (9.77:1).
About this color
#831B25 is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.138 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.033 away. White text reads best on it, at 9.77:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.138) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #831B25 |
| RGB | rgb(131, 27, 37) |
| HSL | hsl(354, 66%, 31%) |
| OKLCH | oklch(40.3% 0.138 21.3) |
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 #831B25 | 9.77:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #831B25 | 2.14:1 | Fails | Lc 12.6 | Not readable |
| #831B25 text on white | 9.77:1 | AAA | Lc 91.4 | Preferred for body text |
| #831B25 text on black | 2.14:1 | Fails | Lc -11.0 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F1ACAA
oklch(80.9% 0.082 20.9)
-
Step 400
400
#E67E7D
oklch(70.8% 0.129 21.4)
-
Step 500
500
#DB585C
oklch(63.1% 0.165 21.3)
-
Step 600
600
#C73742
oklch(55.7% 0.18 21.3)
-
Step 700
700
#AB2834
oklch(49.1% 0.167 21.3)
-
Step 800
800 (this color)
#831B25
oklch(40.3% 0.138 21.3)
-
Step 900
900
#702427
oklch(37.8% 0.108 21.6)
-
Step 950
950
#421617
oklch(27% 0.069 21.5)
#831B25 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) | #3A3624 | 0.152 |
| Deuteranopia (no green cones) | #544C22 | 0.139 |
| Tritanopia (no blue cones) | #900020 | 0.030 |
| Achromatopsia (no color) | #444444 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #831B25
#831B25
oklch(40.3% 0.138 21.3)
- #005358
#005358
oklch(40.3% 0.068 201.8)
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 #831B25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.033
- Wine Red #7B0323 ΔE 0.034
- Brick Red #8F1402 ΔE 0.036
- Maroon #800000 ΔE 0.037
- Red Wine #8C0034 ΔE 0.038
- Bordeaux #7B002C ΔE 0.041
- Red Brown #8B2E16 ΔE 0.047
- Blood Red #980002 ΔE 0.048
Use #831B25 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.