#851817
Closest named color: Dark Red (#8B0000). oklch(40.2% 0.144 27), rgb(133, 24, 23).
Aa
White text reads best on this color (9.81:1).
About this color
#851817 is a dark, vivid red. In OKLCH its lightness is 40%, its chroma 0.144 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.021 away. White text reads best on it, at 9.81:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.14:1 |
| White text | 9.81:1 |
Values
| HEX | #851817 |
| RGB | rgb(133, 24, 23) |
| HSL | hsl(1, 71%, 31%) |
| OKLCH | oklch(40.2% 0.144 27) |
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 #851817 | 9.81:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #851817 | 2.14:1 | Fails | Lc 12.7 | Not readable |
| #851817 text on white | 9.81:1 | AAA | Lc 91.3 | Preferred for body text |
| #851817 text on black | 2.14:1 | Fails | Lc -11.1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F2ACA3
oklch(80.8% 0.084 27.3)
-
Step 400
400
#E97D72
oklch(70.8% 0.135 27.1)
-
Step 500
500
#DE564D
oklch(63% 0.172 26.9)
-
Step 600
600
#CA3430
oklch(55.6% 0.188 26.9)
-
Step 700
700
#AE2422
oklch(49.1% 0.174 27.1)
-
Step 800
800 (this color)
#851817
oklch(40.2% 0.144 27)
-
Step 900
900
#72221E
oklch(37.7% 0.113 26.9)
-
Step 950
950
#431612
oklch(27.1% 0.071 27.8)
#851817 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) | #3B3415 | 0.156 |
| Deuteranopia (no green cones) | #564C12 | 0.141 |
| Tritanopia (no blue cones) | #93001A | 0.031 |
| Achromatopsia (no color) | #444444 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #851817
#851817
oklch(40.2% 0.144 27)
- #00525B
#00525B
oklch(40.1% 0.069 207.5)
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 #851817, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.021
- Brick Red #8F1402 ΔE 0.024
- Maroon #800000 ΔE 0.028
- Blood Red #980002 ΔE 0.040
- Wine Red #7B0323 ΔE 0.040
- Red Brown #8B2E16 ΔE 0.041
- Deep Red #9A0200 ΔE 0.044
- Blood #770001 ΔE 0.045
Use #851817 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.