#900A00
Closest named color: Brick Red (#8F1402). oklch(41.4% 0.165 30.3), rgb(144, 10, 0).
Aa
White text reads best on this color (9.42:1).
About this color
#900A00 is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.165 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Red (#8F1402), ΔE 0.007 away. White text reads best on it, at 9.42:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Brick Red (#8F1402) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #900A00 |
| RGB | rgb(144, 10, 0) |
| HSL | hsl(4, 100%, 28%) |
| OKLCH | oklch(41.4% 0.165 30.3) |
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 #900A00 | 9.42:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #900A00 | 2.22:1 | Fails | Lc 14.3 | Not readable |
| #900A00 text on white | 9.42:1 | AAA | Lc 89.6 | Fine for body text |
| #900A00 text on black | 2.22:1 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FBCDC4
oklch(88.6% 0.054 31)
-
Step 300
300
#F8A99B
oklch(80.8% 0.096 30.4)
-
Step 400
400
#F17764
oklch(70.7% 0.154 30.5)
-
Step 500
500
#E84B38
oklch(63.1% 0.197 30.3)
-
Step 600
600
#D41F0C
oklch(55.7% 0.214 30.3)
-
Step 700
700
#B51000
oklch(49% 0.195 30.4)
-
Step 800
800 (this color)
#900A00
oklch(41.4% 0.165 30.3)
-
Step 900
900
#771B11
oklch(37.7% 0.128 30.2)
-
Step 950
950
#46120B
oklch(26.9% 0.081 30.7)
#900A00 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) | #3C3400 | 0.179 |
| Deuteranopia (no green cones) | #5B5000 | 0.159 |
| Tritanopia (no blue cones) | #A0000B | 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°).
- #900A00
#900A00
oklch(41.4% 0.165 30.3)
- #005661
#005661
oklch(41.5% 0.072 209.7)
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 #900A00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Red #8F1402 ΔE 0.007
- Dark Red #8B0000 ΔE 0.015
- Blood Red #980002 ΔE 0.017
- Deep Red #9A0200 ΔE 0.021
- Carmine #9D0216 ΔE 0.032
- Maroon #800000 ΔE 0.039
- Brown Red #922B05 ΔE 0.040
- Red Brown #8B2E16 ΔE 0.042
Use #900A00 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.