#87310B
Closest named color: Rust Brown (#8B3103). oklch(43.3% 0.126 40.5), rgb(135, 49, 11).
Aa
White text reads best on this color (8.48:1).
About this color
#87310B is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.126 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Brown (#8B3103), ΔE 0.009 away. White text reads best on it, at 8.48:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.126) |
| Temperature | warm |
| Nearest name | Rust Brown (#8B3103) |
| Black text | 2.47:1 |
| White text | 8.48:1 |
Values
| HEX | #87310B |
| RGB | rgb(135, 49, 11) |
| HSL | hsl(18, 85%, 29%) |
| OKLCH | oklch(43.3% 0.126 40.5) |
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 #87310B | 8.48:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #87310B | 2.47:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #87310B text on white | 8.48:1 | AAA | Lc 88.4 | Fine for body text |
| #87310B text on black | 2.47:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F7E6DF
oklch(93.7% 0.021 43.9)
-
Step 200
200
#F2D1C5
oklch(88.5% 0.041 41)
-
Step 300
300
#EBB19D
oklch(80.9% 0.074 39.9)
-
Step 400
400
#DF8666
oklch(70.8% 0.119 40.4)
-
Step 500
500
#D3643A
oklch(63.1% 0.151 40.5)
-
Step 600
600
#BF4712
oklch(55.6% 0.165 40.2)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800 (this color)
#87310B
oklch(43.3% 0.126 40.5)
-
Step 900
900
#6B2B12
oklch(37.6% 0.099 40.4)
-
Step 950
950
#3F1A0C
oklch(26.9% 0.063 40.6)
#87310B 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) | #4A4104 | 0.125 |
| Deuteranopia (no green cones) | #5F5406 | 0.113 |
| Tritanopia (no blue cones) | #951A2A | 0.058 |
| Achromatopsia (no color) | #4D4D4D | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #87310B
#87310B
oklch(43.3% 0.126 40.5)
- #005A6F
#005A6F
oklch(43.3% 0.079 220.8)
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 #87310B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Brown #8B3103 ΔE 0.009
- Red Brown #8B2E16 ΔE 0.013
- Brown Red #922B05 ΔE 0.023
- Brick Red #8F1402 ΔE 0.042
- Saddle Brown #8B4513 ΔE 0.046
- Chestnut #742802 ΔE 0.048
- Burnt Red #9F2305 ΔE 0.050
- Auburn #9B2226 ΔE 0.054
Use #87310B 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.