#851B1F
Closest named color: Dark Red (#8B0000). oklch(40.6% 0.141 24.5), rgb(133, 27, 31).
Aa
White text reads best on this color (9.66:1).
About this color
#851B1F is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.141 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.027 away. White text reads best on it, at 9.66:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.17:1 |
| White text | 9.66:1 |
Values
| HEX | #851B1F |
| RGB | rgb(133, 27, 31) |
| HSL | hsl(358, 66%, 31%) |
| OKLCH | oklch(40.6% 0.141 24.5) |
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 #851B1F | 9.66:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #851B1F | 2.17:1 | Fails | Lc 12.9 | Not readable |
| #851B1F text on white | 9.66:1 | AAA | Lc 91.0 | Preferred for body text |
| #851B1F text on black | 2.17:1 | Fails | Lc -11.3 | 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
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F6CECA
oklch(88.4% 0.046 24.8)
-
Step 300
300
#F1ACA6
oklch(80.8% 0.082 24.6)
-
Step 400
400
#E77D77
oklch(70.6% 0.132 24.3)
-
Step 500
500
#DD5754
oklch(63.1% 0.169 24.5)
-
Step 600
600
#C83639
oklch(55.6% 0.183 24.4)
-
Step 700
700
#AC262B
oklch(49% 0.17 24.5)
-
Step 800
800 (this color)
#851B1F
oklch(40.6% 0.141 24.5)
-
Step 900
900
#712323
oklch(37.8% 0.11 24.1)
-
Step 950
950
#421615
oklch(27% 0.069 24.1)
#851B1F 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) | #3B361E | 0.154 |
| Deuteranopia (no green cones) | #564D1B | 0.140 |
| Tritanopia (no blue cones) | #93001E | 0.032 |
| Achromatopsia (no color) | #454545 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #851B1F
#851B1F
oklch(40.6% 0.141 24.5)
- #00545B
#00545B
oklch(40.7% 0.069 204.6)
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 #851B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.027
- Brick Red #8F1402 ΔE 0.028
- Maroon #800000 ΔE 0.034
- Wine Red #7B0323 ΔE 0.040
- Red Brown #8B2E16 ΔE 0.041
- Blood Red #980002 ΔE 0.042
- Red Wine #8C0034 ΔE 0.043
- Deep Red #9A0200 ΔE 0.046
Use #851B1F 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.