#90371B
Closest named color: Rust Brown (#8B3103). oklch(45.7% 0.127 37.5), rgb(144, 55, 27).
Aa
White text reads best on this color (7.64:1).
About this color
#90371B is a medium-dark, moderately saturated red. In OKLCH its lightness is 46%, its chroma 0.127 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Brown (#8B3103), ΔE 0.021 away. White text reads best on it, at 7.64:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.127) |
| Temperature | warm |
| Nearest name | Rust Brown (#8B3103) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #90371B |
| RGB | rgb(144, 55, 27) |
| HSL | hsl(14, 68%, 34%) |
| OKLCH | oklch(45.7% 0.127 37.5) |
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 #90371B | 7.64:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #90371B | 2.74:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #90371B text on white | 7.64:1 | AAA | Lc 85.8 | Fine for body text |
| #90371B text on black | 2.74:1 | Fails | Lc -16.3 | Dividers and decoration only |
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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C6
oklch(88.4% 0.042 36.5)
-
Step 300
300
#ECB09F
oklch(80.8% 0.075 36.4)
-
Step 400
400
#E0856A
oklch(70.8% 0.119 37.3)
-
Step 500
500
#D46240
oklch(63% 0.152 37.3)
-
Step 600
600
#C0451D
oklch(55.6% 0.166 37.3)
-
Step 700
700
#A5360E
oklch(49.1% 0.153 37.6)
-
Step 800
800 (this color)
#90371B
oklch(45.7% 0.127 37.5)
-
Step 900
900
#6C2A16
oklch(37.7% 0.1 37.3)
-
Step 950
950
#401A0E
oklch(27.2% 0.063 38.1)
#90371B 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) | #504717 | 0.127 |
| Deuteranopia (no green cones) | #665B18 | 0.116 |
| Tritanopia (no blue cones) | #9F2131 | 0.055 |
| Achromatopsia (no color) | #535353 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90371B
#90371B
oklch(45.7% 0.127 37.5)
- #006275
#006275
oklch(45.8% 0.082 217.1)
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 #90371B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Brown #8B3103 ΔE 0.021
- Brown Red #922B05 ΔE 0.022
- Red Brown #8B2E16 ΔE 0.022
- Brick #A03623 ΔE 0.034
- Saddle Brown #8B4513 ΔE 0.034
- Russet #A13905 ΔE 0.037
- Burnt Red #9F2305 ΔE 0.038
- Auburn #9B2226 ΔE 0.043
Use #90371B 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.