#831B04
Closest named color: Dark Red (#8B0000). oklch(39.9% 0.142 33.3), rgb(131, 27, 4).
Aa
White text reads best on this color (9.88:1).
About this color
#831B04 is a dark, vivid red. In OKLCH its lightness is 40%, its chroma 0.142 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.024 away. White text reads best on it, at 9.88:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.12:1 |
| White text | 9.88:1 |
Values
| HEX | #831B04 |
| RGB | rgb(131, 27, 4) |
| HSL | hsl(11, 94%, 26%) |
| OKLCH | oklch(39.9% 0.142 33.3) |
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 #831B04 | 9.88:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #831B04 | 2.12:1 | Fails | Lc 12.4 | Not readable |
| #831B04 text on white | 9.88:1 | AAA | Lc 91.5 | Preferred for body text |
| #831B04 text on black | 2.12:1 | Fails | Lc -10.8 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FEE3DD
oklch(93.6% 0.031 32.6)
-
Step 200
200
#FECCC0
oklch(88.6% 0.059 33.8)
-
Step 300
300
#FEA794
oklch(80.9% 0.107 32.9)
-
Step 400
400
#F87256
oklch(70.7% 0.17 33.3)
-
Step 500
500
#F03F19
oklch(63% 0.218 33.2)
-
Step 600
600
#CF2B00
oklch(55.5% 0.204 33.2)
-
Step 700
700
#B02300
oklch(49.2% 0.18 33.2)
-
Step 800
800
#911B00
oklch(42.6% 0.157 33.2)
-
Step 900
900 (this color)
#831B04
oklch(39.9% 0.142 33.3)
-
Step 950
950
#490F04
oklch(27.1% 0.09 33.5)
#831B04 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) | #3C3400 | 0.151 |
| Deuteranopia (no green cones) | #564B00 | 0.134 |
| Tritanopia (no blue cones) | #910018 | 0.039 |
| Achromatopsia (no color) | #434343 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #831B04
#831B04
oklch(39.9% 0.142 33.3)
- #00515E
#00515E
oklch(40% 0.07 213.1)
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 #831B04, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.024
- Brick Red #8F1402 ΔE 0.025
- Maroon #800000 ΔE 0.028
- Chestnut #742802 ΔE 0.035
- Red Brown #8B2E16 ΔE 0.039
- Blood #770001 ΔE 0.043
- Blood Red #980002 ΔE 0.044
- Rust Brown #8B3103 ΔE 0.045
Use #831B04 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.