#900319
Closest named color: Dark Red (#8B0000). oklch(41.3% 0.165 23.7), rgb(144, 3, 25).
Aa
White text reads best on this color (9.48:1).
About this color
#900319 is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.165 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Red (#8B0000), ΔE 0.021 away. White text reads best on it, at 9.48:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Dark Red (#8B0000) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #900319 |
| RGB | rgb(144, 3, 25) |
| HSL | hsl(351, 96%, 29%) |
| OKLCH | oklch(41.3% 0.165 23.7) |
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 #900319 | 9.48:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #900319 | 2.21:1 | Fails | Lc 14.3 | Not readable |
| #900319 text on white | 9.48:1 | AAA | Lc 89.6 | Fine for body text |
| #900319 text on black | 2.21:1 | 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
#FBCCC8
oklch(88.5% 0.054 23.9)
-
Step 300
300
#F9A8A3
oklch(80.9% 0.097 23.3)
-
Step 400
400
#F27571
oklch(70.8% 0.155 23.7)
-
Step 500
500
#E9484B
oklch(63.2% 0.198 23.9)
-
Step 600
600
#D4182E
oklch(55.6% 0.214 23.7)
-
Step 700
700
#B70021
oklch(49.2% 0.199 23.8)
-
Step 800
800 (this color)
#900319
oklch(41.3% 0.165 23.7)
-
Step 900
900
#77191D
oklch(37.7% 0.128 23.9)
-
Step 950
950
#461112
oklch(26.9% 0.081 23.4)
#900319 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) | #393318 | 0.184 |
| Deuteranopia (no green cones) | #594F12 | 0.165 |
| Tritanopia (no blue cones) | #9F000F | 0.034 |
| Achromatopsia (no color) | #464646 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900319
#900319
oklch(41.3% 0.165 23.7)
- #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 #900319, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Red #8B0000 ΔE 0.021
- Blood Red #980002 ΔE 0.023
- Brick Red #8F1402 ΔE 0.023
- Deep Red #9A0200 ΔE 0.027
- Carmine #9D0216 ΔE 0.029
- Red Wine #8C0034 ΔE 0.037
- Maroon #800000 ΔE 0.041
- Auburn #9B2226 ΔE 0.042
Use #900319 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.