#900C09
Closest named color: Brick Red (#8F1402). oklch(41.6% 0.163 28.8), rgb(144, 12, 9).
Aa
White text reads best on this color (9.36:1).
About this color
#900C09 is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.163 and its hue 29°. 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 9.36:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Brick Red (#8F1402) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #900C09 |
| RGB | rgb(144, 12, 9) |
| HSL | hsl(1, 88%, 30%) |
| OKLCH | oklch(41.6% 0.163 28.8) |
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 #900C09 | 9.36:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #900C09 | 2.24:1 | Fails | Lc 14.4 | Not readable |
| #900C09 text on white | 9.36:1 | AAA | Lc 89.6 | Fine for body text |
| #900C09 text on black | 2.24:1 | 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
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FACDC5
oklch(88.5% 0.052 29.9)
-
Step 300
300
#F8A99D
oklch(80.8% 0.096 28.9)
-
Step 400
400
#F07768
oklch(70.6% 0.152 28.7)
-
Step 500
500
#E74B3E
oklch(63% 0.195 28.6)
-
Step 600
600
#D32019
oklch(55.6% 0.212 28.9)
-
Step 700
700
#B60A09
oklch(49.1% 0.197 28.8)
-
Step 800
800 (this color)
#900C09
oklch(41.6% 0.163 28.8)
-
Step 900
900
#771B15
oklch(37.7% 0.127 28.5)
-
Step 950
950
#46120D
oklch(27% 0.081 29)
#900C09 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) | #3C3505 | 0.179 |
| Deuteranopia (no green cones) | #5B5000 | 0.159 |
| Tritanopia (no blue cones) | #A0000F | 0.034 |
| Achromatopsia (no color) | #464646 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900C09
#900C09
oklch(41.6% 0.163 28.8)
- #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 #900C09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Red #8F1402 ΔE 0.009
- Dark Red #8B0000 ΔE 0.016
- Blood Red #980002 ΔE 0.016
- Deep Red #9A0200 ΔE 0.021
- Carmine #9D0216 ΔE 0.029
- Maroon #800000 ΔE 0.040
- Brown Red #922B05 ΔE 0.041
- Auburn #9B2226 ΔE 0.041
Use #900C09 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.