#831C17
Closest named color: Dark Red (#8B0000). oklch(40.2% 0.139 28.1), rgb(131, 28, 23).
Aa
White text reads best on this color (9.79:1).
About this color
#831C17 is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.139 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.025 away. White text reads best on it, at 9.79:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.139) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #831C17 |
| RGB | rgb(131, 28, 23) |
| HSL | hsl(3, 70%, 30%) |
| OKLCH | oklch(40.2% 0.139 28.1) |
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 #831C17 | 9.79:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #831C17 | 2.14:1 | Fails | Lc 12.6 | Not readable |
| #831C17 text on white | 9.79:1 | AAA | Lc 91.4 | Preferred for body text |
| #831C17 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 900.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DF
oklch(93.7% 0.03 27.8)
-
Step 200
200
#FDCBC4
oklch(88.4% 0.058 27.5)
-
Step 300
300
#FDA79B
oklch(81% 0.104 28.3)
-
Step 400
400
#F77163
oklch(70.7% 0.167 28.1)
-
Step 500
500
#EF4036
oklch(63.2% 0.213 28.2)
-
Step 600
600
#D9000E
oklch(55.6% 0.227 28.1)
-
Step 700
700
#B8000A
oklch(49.2% 0.201 28.1)
-
Step 800
800
#980006
oklch(42.7% 0.175 28.2)
-
Step 900
900 (this color)
#831C17
oklch(40.2% 0.139 28.1)
-
Step 950
950
#480F0B
oklch(27% 0.087 28.4)
#831C17 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) | #3C3515 | 0.149 |
| Deuteranopia (no green cones) | #554C12 | 0.137 |
| Tritanopia (no blue cones) | #91001C | 0.034 |
| Achromatopsia (no color) | #444444 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #831C17
#831C17
oklch(40.2% 0.139 28.1)
- #00525C
#00525C
oklch(40.1% 0.069 208.9)
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 #831C17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.025
- Brick Red #8F1402 ΔE 0.027
- Maroon #800000 ΔE 0.030
- Red Brown #8B2E16 ΔE 0.039
- Chestnut #742802 ΔE 0.041
- Wine Red #7B0323 ΔE 0.042
- Blood Red #980002 ΔE 0.044
- Blood #770001 ΔE 0.045
Use #831C17 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.