#90021E
Closest named color: Dark Red (#8B0000). oklch(41.4% 0.165 21.8), rgb(144, 2, 30).
Aa
White text reads best on this color (9.48:1).
About this color
#90021E 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 0.026 away. White text reads best on it, at 9.48:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #90021E |
| RGB | rgb(144, 2, 30) |
| HSL | hsl(348, 97%, 29%) |
| OKLCH | oklch(41.4% 0.165 21.8) |
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 #90021E | 9.48:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #90021E | 2.21:1 | Fails | Lc 14.4 | Not readable |
| #90021E text on white | 9.48:1 | AAA | Lc 89.6 | Fine for body text |
| #90021E 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FBCCC9
oklch(88.5% 0.054 22.5)
-
Step 300
300
#F9A8A5
oklch(80.9% 0.096 21.7)
-
Step 400
400
#F27474
oklch(70.7% 0.156 21.8)
-
Step 500
500
#E94751
oklch(63.2% 0.198 21.6)
-
Step 600
600
#D41635
oklch(55.6% 0.215 21.6)
-
Step 700
700
#B60028
oklch(49% 0.197 21.7)
-
Step 800
800 (this color)
#90021E
oklch(41.4% 0.165 21.8)
-
Step 900
900
#771820
oklch(37.6% 0.129 21.9)
-
Step 950
950
#461113
oklch(26.9% 0.081 22.4)
#90021E 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) | #39331D | 0.183 |
| Deuteranopia (no green cones) | #594F18 | 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°).
- #90021E
#90021E
oklch(41.4% 0.165 21.8)
- #00565B
#00565B
oklch(41.2% 0.07 201.6)
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 #90021E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.026
- Blood Red #980002 ΔE 0.027
- Brick Red #8F1402 ΔE 0.028
- Carmine #9D0216 ΔE 0.030
- Deep Red #9A0200 ΔE 0.031
- Red Wine #8C0034 ΔE 0.032
- Auburn #9B2226 ΔE 0.042
- Maroon #800000 ΔE 0.044
Use #90021E 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.