#901637
Closest named color: Red Wine (#8C0034). oklch(42.8% 0.155 12.5), rgb(144, 22, 55).
Aa
White text reads best on this color (8.91:1).
About this color
#901637 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.155 and its hue 12°. Its hue sits on the warm side of the wheel. The nearest named color is Red Wine (#8C0034), ΔE 0.021 away. White text reads best on it, at 8.91:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Red Wine (#8C0034) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #901637 |
| RGB | rgb(144, 22, 55) |
| HSL | hsl(344, 73%, 33%) |
| OKLCH | oklch(42.8% 0.155 12.5) |
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 #901637 | 8.91:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #901637 | 2.35:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #901637 text on white | 8.91:1 | AAA | Lc 88.9 | Fine for body text |
| #901637 text on black | 2.35:1 | Fails | Lc -13.3 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FBE3E5
oklch(93.6% 0.026 11.9)
-
Step 200
200
#F9CCD0
oklch(88.5% 0.051 12.1)
-
Step 300
300
#F5A9B0
oklch(81% 0.09 13.2)
-
Step 400
400
#EC7787
oklch(70.8% 0.145 12.9)
-
Step 500
500
#E24C6A
oklch(63.1% 0.186 12.4)
-
Step 600
600
#CD2452
oklch(55.5% 0.201 12.4)
-
Step 700
700
#B11242
oklch(49.1% 0.187 12.7)
-
Step 800
800 (this color)
#901637
oklch(42.8% 0.155 12.5)
-
Step 900
900
#741C2F
oklch(37.8% 0.121 12.9)
-
Step 950
950
#44121C
oklch(26.9% 0.077 12)
#901637 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) | #3B3A37 | 0.173 |
| Deuteranopia (no green cones) | #595234 | 0.158 |
| Tritanopia (no blue cones) | #9E0025 | 0.035 |
| Achromatopsia (no color) | #4A4A4A | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #901637
#901637
oklch(42.8% 0.155 12.5)
- #005C5A
#005C5A
oklch(42.9% 0.074 192.2)
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 #901637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Wine #8C0034 ΔE 0.021
- Cranberry #9E003A ΔE 0.030
- Purple Red #990147 ΔE 0.035
- Berry #990F4B ΔE 0.036
- Mulberry #920A4E ΔE 0.041
- Auburn #9B2226 ΔE 0.042
- Carmine #9D0216 ΔE 0.044
- Wine #80013F ΔE 0.050
Use #901637 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.