#901F23
Closest named color: Auburn (#9B2226). oklch(43.1% 0.148 24.5), rgb(144, 31, 35).
Aa
White text reads best on this color (8.72:1).
About this color
#901F23 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.148 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Auburn (#9B2226), ΔE 0.025 away. White text reads best on it, at 8.72:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Auburn (#9B2226) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #901F23 |
| RGB | rgb(144, 31, 35) |
| HSL | hsl(358, 65%, 34%) |
| OKLCH | oklch(43.1% 0.148 24.5) |
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 #901F23 | 8.72:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #901F23 | 2.40:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #901F23 text on white | 8.72:1 | AAA | Lc 88.6 | Fine for body text |
| #901F23 text on black | 2.40:1 | Fails | Lc -13.6 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F8CECA
oklch(88.6% 0.048 24.5)
-
Step 300
300
#F4ABA5
oklch(80.9% 0.087 24.4)
-
Step 400
400
#EA7B75
oklch(70.7% 0.138 24.4)
-
Step 500
500
#E05351
oklch(63% 0.177 24.4)
-
Step 600
600
#CC2F35
oklch(55.6% 0.193 24.4)
-
Step 700
700
#B01F28
oklch(49.2% 0.179 24.4)
-
Step 800
800 (this color)
#901F23
oklch(43.1% 0.148 24.5)
-
Step 900
900
#732021
oklch(37.7% 0.116 24)
-
Step 950
950
#441514
oklch(27.2% 0.073 24.5)
#901F23 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) | #413B22 | 0.162 |
| Deuteranopia (no green cones) | #5D541F | 0.148 |
| Tritanopia (no blue cones) | #9F0022 | 0.034 |
| Achromatopsia (no color) | #4B4B4B | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #901F23
#901F23
oklch(43.1% 0.148 24.5)
- #005B63
#005B63
oklch(43% 0.073 205.2)
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 #901F23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Auburn #9B2226 ΔE 0.025
- Brick Red #8F1402 ΔE 0.025
- Blood Red #980002 ΔE 0.030
- Carmine #9D0216 ΔE 0.030
- Deep Red #9A0200 ΔE 0.031
- Red Brown #8B2E16 ΔE 0.032
- Brown Red #922B05 ΔE 0.035
- Dark Red #8B0000 ΔE 0.037
Use #901F23 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.