#901F00
Closest named color: Brick Red (#8F1402). oklch(42.8% 0.153 34.3), rgb(144, 31, 0).
Aa
White text reads best on this color (8.81:1).
About this color
#901F00 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.153 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Red (#8F1402), ΔE 0.014 away. White text reads best on it, at 8.81:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Brick Red (#8F1402) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #901F00 |
| RGB | rgb(144, 31, 0) |
| HSL | hsl(13, 100%, 28%) |
| OKLCH | oklch(42.8% 0.153 34.3) |
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 #901F00 | 8.81:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #901F00 | 2.38:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #901F00 text on white | 8.81:1 | AAA | Lc 88.7 | Fine for body text |
| #901F00 text on black | 2.38:1 | Fails | Lc -13.5 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F8CEC4
oklch(88.5% 0.05 33.6)
-
Step 300
300
#F4AC9A
oklch(80.8% 0.089 34.6)
-
Step 400
400
#EB7C62
oklch(70.6% 0.143 34.3)
-
Step 500
500
#E25434
oklch(63.1% 0.183 34.2)
-
Step 600
600
#CD3100
oklch(55.6% 0.198 34.4)
-
Step 700
700
#AE2700
oklch(49.1% 0.176 34.2)
-
Step 800
800 (this color)
#901F00
oklch(42.8% 0.153 34.3)
-
Step 900
900
#73210E
oklch(37.6% 0.119 34.2)
-
Step 950
950
#44150A
oklch(27% 0.075 34.5)
#901F00 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) | #433A00 | 0.161 |
| Deuteranopia (no green cones) | #5F5300 | 0.142 |
| Tritanopia (no blue cones) | #9F001B | 0.043 |
| Achromatopsia (no color) | #4A4A4A | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #901F00
#901F00
oklch(42.8% 0.153 34.3)
- #005968
#005968
oklch(42.7% 0.075 214.2)
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 #901F00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Red #8F1402 ΔE 0.014
- Brown Red #922B05 ΔE 0.020
- Red Brown #8B2E16 ΔE 0.023
- Blood Red #980002 ΔE 0.027
- Deep Red #9A0200 ΔE 0.028
- Rust Brown #8B3103 ΔE 0.029
- Dark Red #8B0000 ΔE 0.033
- Burnt Red #9F2305 ΔE 0.034
Use #901F00 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.