#900F0D
Closest named color: Brick Red (#8F1402). oklch(41.7% 0.161 28.4), rgb(144, 15, 13).
Aa
White text reads best on this color (9.29:1).
About this color
#900F0D is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.161 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Red (#8F1402), ΔE 0.009 away. White text reads best on it, at 9.29:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Brick Red (#8F1402) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #900F0D |
| RGB | rgb(144, 15, 13) |
| HSL | hsl(1, 83%, 31%) |
| OKLCH | oklch(41.7% 0.161 28.4) |
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 #900F0D | 9.29:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #900F0D | 2.25:1 | Fails | Lc 14.5 | Not readable |
| #900F0D text on white | 9.29:1 | AAA | Lc 89.5 | Fine for body text |
| #900F0D text on black | 2.25:1 | Fails | Lc -12.7 | 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
#FCE4E0
oklch(93.7% 0.027 28.9)
-
Step 200
200
#FACDC6
oklch(88.5% 0.052 28.5)
-
Step 300
300
#F8AA9E
oklch(81% 0.094 29)
-
Step 400
400
#F07869
oklch(70.8% 0.151 28.7)
-
Step 500
500
#E74C40
oklch(63.1% 0.193 28.3)
-
Step 600
600
#D2221D
oklch(55.6% 0.209 28.4)
-
Step 700
700
#B50E0E
oklch(49% 0.194 28.5)
-
Step 800
800 (this color)
#900F0D
oklch(41.7% 0.161 28.4)
-
Step 900
900
#761C16
oklch(37.7% 0.125 28.5)
-
Step 950
950
#46120E
oklch(27% 0.081 28.1)
#900F0D 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) | #3D350A | 0.176 |
| Deuteranopia (no green cones) | #5B5103 | 0.160 |
| Tritanopia (no blue cones) | #9F0012 | 0.032 |
| Achromatopsia (no color) | #474747 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900F0D
#900F0D
oklch(41.7% 0.161 28.4)
- #005761
#005761
oklch(41.8% 0.072 208.2)
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 #900F0D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Red #8F1402 ΔE 0.009
- Blood Red #980002 ΔE 0.017
- Dark Red #8B0000 ΔE 0.018
- Deep Red #9A0200 ΔE 0.021
- Carmine #9D0216 ΔE 0.028
- Auburn #9B2226 ΔE 0.039
- Brown Red #922B05 ΔE 0.039
- Red Brown #8B2E16 ΔE 0.039
Use #900F0D 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.