#900F1A
Closest named color: Brick Red (#8F1402). oklch(41.8% 0.16 24.7), rgb(144, 15, 26).
Aa
White text reads best on this color (9.25:1).
About this color
#900F1A is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.160 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Red (#8F1402), ΔE 0.019 away. White text reads best on it, at 9.25:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Brick Red (#8F1402) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #900F1A |
| RGB | rgb(144, 15, 26) |
| HSL | hsl(355, 81%, 31%) |
| OKLCH | oklch(41.8% 0.16 24.7) |
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 #900F1A | 9.25:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #900F1A | 2.26:1 | Fails | Lc 14.5 | Not readable |
| #900F1A text on white | 9.25:1 | AAA | Lc 89.5 | Fine for body text |
| #900F1A text on black | 2.26:1 | Fails | Lc -12.8 | 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
#FACDC8
oklch(88.6% 0.052 25.6)
-
Step 300
300
#F7A9A2
oklch(80.8% 0.093 25)
-
Step 400
400
#EF7771
oklch(70.7% 0.149 24.5)
-
Step 500
500
#E64C4B
oklch(63.1% 0.191 24.8)
-
Step 600
600
#D2212D
oklch(55.7% 0.208 24.8)
-
Step 700
700
#B50D20
oklch(49.1% 0.193 24.8)
-
Step 800
800 (this color)
#900F1A
oklch(41.8% 0.16 24.7)
-
Step 900
900
#761B1D
oklch(37.7% 0.125 24.5)
-
Step 950
950
#461212
oklch(27.1% 0.08 24.2)
#900F1A 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) | #3C3619 | 0.176 |
| Deuteranopia (no green cones) | #5B5114 | 0.160 |
| Tritanopia (no blue cones) | #9F0016 | 0.031 |
| Achromatopsia (no color) | #474747 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900F1A
#900F1A
oklch(41.8% 0.16 24.7)
- #00585F
#00585F
oklch(42% 0.072 204.2)
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 #900F1A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Red #8F1402 ΔE 0.019
- Blood Red #980002 ΔE 0.021
- Dark Red #8B0000 ΔE 0.023
- Deep Red #9A0200 ΔE 0.025
- Carmine #9D0216 ΔE 0.027
- Auburn #9B2226 ΔE 0.036
- Red Wine #8C0034 ΔE 0.041
- Red Brown #8B2E16 ΔE 0.043
Use #900F1A 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.