#90021D
Closest named color: Dark Red (#8B0000). oklch(41.3% 0.165 22.1), rgb(144, 2, 29).
Aa
White text reads best on this color (9.49:1).
About this color
#90021D is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.165 and its hue 22°. 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 9.49:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #90021D |
| RGB | rgb(144, 2, 29) |
| HSL | hsl(349, 97%, 29%) |
| OKLCH | oklch(41.3% 0.165 22.1) |
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 #90021D | 9.49:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #90021D | 2.21:1 | Fails | Lc 14.4 | Not readable |
| #90021D text on white | 9.49:1 | AAA | Lc 89.6 | Fine for body text |
| #90021D text on black | 2.21:1 | Fails | Lc -12.6 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC9
oklch(88.5% 0.054 22.5)
-
Step 300
300
#F9A8A4
oklch(80.9% 0.096 22.5)
-
Step 400
400
#F27474
oklch(70.7% 0.156 21.8)
-
Step 500
500
#E9474F
oklch(63.1% 0.198 22.3)
-
Step 600
600
#D41633
oklch(55.6% 0.215 22.2)
-
Step 700
700
#B60027
oklch(49% 0.197 22)
-
Step 800
800 (this color)
#90021D
oklch(41.3% 0.165 22.1)
-
Step 900
900
#771820
oklch(37.6% 0.129 21.9)
-
Step 950
950
#461113
oklch(26.9% 0.081 22.4)
#90021D 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) | #39331C | 0.184 |
| Deuteranopia (no green cones) | #594F17 | 0.166 |
| Tritanopia (no blue cones) | #9F0011 | 0.035 |
| Achromatopsia (no color) | #464646 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90021D
#90021D
oklch(41.3% 0.165 22.1)
- #00565C
#00565C
oklch(41.3% 0.07 203)
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 #90021D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.025
- Blood Red #980002 ΔE 0.026
- Brick Red #8F1402 ΔE 0.027
- Carmine #9D0216 ΔE 0.030
- Deep Red #9A0200 ΔE 0.030
- Red Wine #8C0034 ΔE 0.033
- Auburn #9B2226 ΔE 0.042
- Maroon #800000 ΔE 0.043
Use #90021D 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.