#81391C
Closest named color: Rust Brown (#8B3103). oklch(43.6% 0.108 41.2), rgb(129, 57, 28).
Aa
White text reads best on this color (8.28:1).
About this color
#81391C is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.108 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Brown (#8B3103), ΔE 0.024 away. White text reads best on it, at 8.28:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.108) |
| Temperature | warm |
| Nearest name | Rust Brown (#8B3103) |
| Black text | 2.53:1 |
| White text | 8.28:1 |
Values
| HEX | #81391C |
| RGB | rgb(129, 57, 28) |
| HSL | hsl(17, 64%, 31%) |
| OKLCH | oklch(43.6% 0.108 41.2) |
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 #81391C | 8.28:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #81391C | 2.53:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #81391C text on white | 8.28:1 | AAA | Lc 88.1 | Fine for body text |
| #81391C text on black | 2.53:1 | Fails | Lc -14.1 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EFD2C8
oklch(88.5% 0.035 40)
-
Step 300
300
#E5B4A2
oklch(80.9% 0.063 41.1)
-
Step 400
400
#D68B6F
oklch(70.7% 0.1 41.2)
-
Step 500
500
#C96C48
oklch(63.1% 0.128 41.4)
-
Step 600
600
#B55129
oklch(55.6% 0.141 41)
-
Step 700
700
#9B411B
oklch(49% 0.13 41.3)
-
Step 800
800 (this color)
#81391C
oklch(43.6% 0.108 41.2)
-
Step 900
900
#66301B
oklch(37.7% 0.084 41.2)
-
Step 950
950
#3C1D11
oklch(27.1% 0.053 41.5)
#81391C 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) | #4D4418 | 0.103 |
| Deuteranopia (no green cones) | #5F541A | 0.093 |
| Tritanopia (no blue cones) | #8E2933 | 0.054 |
| Achromatopsia (no color) | #4E4E4E | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81391C
#81391C
oklch(43.6% 0.108 41.2)
- #005B70
#005B70
oklch(43.6% 0.08 220.6)
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 #81391C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Brown #8B3103 ΔE 0.024
- Red Brown #8B2E16 ΔE 0.027
- Brown Red #922B05 ΔE 0.038
- Saddle Brown #8B4513 ΔE 0.040
- Chestnut #742802 ΔE 0.050
- Milk Chocolate #7F4E1E ΔE 0.052
- Brick Red #8F1402 ΔE 0.058
- Brick #A03623 ΔE 0.063
Use #81391C 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.