#900015
Closest named color: Dark Red (#8B0000). oklch(41.2% 0.167 24.6), rgb(144, 0, 21).
Aa
White text reads best on this color (9.55:1).
About this color
#900015 is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.167 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.018 away. White text reads best on it, at 9.55:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #900015 |
| RGB | rgb(144, 0, 21) |
| HSL | hsl(351, 100%, 28%) |
| OKLCH | oklch(41.2% 0.167 24.6) |
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 #900015 | 9.55:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #900015 | 2.19:1 | Fails | Lc 14.3 | Not readable |
| #900015 text on white | 9.55:1 | AAA | Lc 89.7 | Fine for body text |
| #900015 text on black | 2.19:1 | 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
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC7
oklch(88.5% 0.054 25.3)
-
Step 300
300
#F9A8A1
oklch(80.9% 0.097 24.9)
-
Step 400
400
#F2756F
oklch(70.7% 0.155 24.6)
-
Step 500
500
#E94748
oklch(63% 0.199 24.6)
-
Step 600
600
#D5152A
oklch(55.6% 0.217 24.5)
-
Step 700
700
#B7001E
oklch(49.1% 0.199 24.5)
-
Step 800
800 (this color)
#900015
oklch(41.2% 0.167 24.6)
-
Step 900
900
#78181B
oklch(37.7% 0.13 24.7)
-
Step 950
950
#471111
oklch(27.1% 0.082 24.5)
#900015 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) | #393314 | 0.185 |
| Deuteranopia (no green cones) | #594F0D | 0.167 |
| Tritanopia (no blue cones) | #9F000C | 0.034 |
| Achromatopsia (no color) | #454545 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900015
#900015
oklch(41.2% 0.167 24.6)
- #00565D
#00565D
oklch(41.3% 0.07 204.4)
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 #900015, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.018
- Blood Red #980002 ΔE 0.021
- Brick Red #8F1402 ΔE 0.022
- Deep Red #9A0200 ΔE 0.026
- Carmine #9D0216 ΔE 0.029
- Maroon #800000 ΔE 0.039
- Red Wine #8C0034 ΔE 0.040
- Auburn #9B2226 ΔE 0.044
Use #900015 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.