#90231C
Closest named color: Red Brown (#8B2E16). oklch(43.4% 0.146 28.5), rgb(144, 35, 28).
Aa
White text reads best on this color (8.59:1).
About this color
#90231C is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.146 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Red Brown (#8B2E16), ΔE 0.022 away. White text reads best on it, at 8.59:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Red Brown (#8B2E16) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #90231C |
| RGB | rgb(144, 35, 28) |
| HSL | hsl(4, 67%, 34%) |
| OKLCH | oklch(43.4% 0.146 28.5) |
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 #90231C | 8.59:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #90231C | 2.44:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #90231C text on white | 8.59:1 | AAA | Lc 88.3 | Fine for body text |
| #90231C text on black | 2.44:1 | Fails | Lc -13.9 | 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
#F7CEC8
oklch(88.5% 0.047 27.8)
-
Step 300
300
#F3ACA2
oklch(80.9% 0.085 28)
-
Step 400
400
#E97D6F
oklch(70.7% 0.136 28.6)
-
Step 500
500
#DF5648
oklch(63.1% 0.174 28.8)
-
Step 600
600
#CB332A
oklch(55.7% 0.19 28.4)
-
Step 700
700
#AF231D
oklch(49.1% 0.177 28.3)
-
Step 800
800 (this color)
#90231C
oklch(43.4% 0.146 28.5)
-
Step 900
900
#72221B
oklch(37.7% 0.114 28.6)
-
Step 950
950
#431511
oklch(26.9% 0.072 27.9)
#90231C 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) | #443D1A | 0.156 |
| Deuteranopia (no green cones) | #5F5517 | 0.143 |
| Tritanopia (no blue cones) | #9F0023 | 0.040 |
| Achromatopsia (no color) | #4C4C4C | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90231C
#90231C
oklch(43.4% 0.146 28.5)
- #005C66
#005C66
oklch(43.4% 0.075 207.6)
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 #90231C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Brown #8B2E16 ΔE 0.022
- Brick Red #8F1402 ΔE 0.022
- Brown Red #922B05 ΔE 0.024
- Auburn #9B2226 ΔE 0.026
- Blood Red #980002 ΔE 0.030
- Deep Red #9A0200 ΔE 0.030
- Carmine #9D0216 ΔE 0.033
- Rust Brown #8B3103 ΔE 0.034
Use #90231C 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.