#900337
Closest named color: Red Wine (#8C0034). oklch(41.9% 0.166 10.3), rgb(144, 3, 55).
Aa
White text reads best on this color (9.31:1).
About this color
#900337 is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.166 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Red Wine (#8C0034), ΔE 0.010 away. White text reads best on it, at 9.31:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Red Wine (#8C0034) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #900337 |
| RGB | rgb(144, 3, 55) |
| HSL | hsl(338, 96%, 29%) |
| OKLCH | oklch(41.9% 0.166 10.3) |
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 #900337 | 9.31:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #900337 | 2.25:1 | Fails | Lc 14.7 | Not readable |
| #900337 text on white | 9.31:1 | AAA | Lc 89.3 | Fine for body text |
| #900337 text on black | 2.25:1 | Fails | Lc -12.9 | 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
#FEF2F3
oklch(97.1% 0.013 11.5)
-
Step 100
100
#FCE3E5
oklch(93.7% 0.028 12.1)
-
Step 200
200
#FACBD1
oklch(88.4% 0.054 9.6)
-
Step 300
300
#F8A7B2
oklch(81% 0.096 10.5)
-
Step 400
400
#F0738A
oklch(70.8% 0.155 10.4)
-
Step 500
500
#E6456D
oklch(63.1% 0.198 10.3)
-
Step 600
600
#D11355
oklch(55.5% 0.214 10.3)
-
Step 700
700
#B40046
oklch(49.2% 0.197 10.4)
-
Step 800
800 (this color)
#900337
oklch(41.9% 0.166 10.3)
-
Step 900
900
#761731
oklch(37.7% 0.129 10.5)
-
Step 950
950
#46101D
oklch(27.1% 0.082 10.3)
#900337 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) | #353638 | 0.188 |
| Deuteranopia (no green cones) | #575034 | 0.168 |
| Tritanopia (no blue cones) | #9E001F | 0.045 |
| Achromatopsia (no color) | #474747 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900337
#900337
oklch(41.9% 0.166 10.3)
- #005956
#005956
oklch(41.9% 0.072 190.8)
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 #900337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Wine #8C0034 ΔE 0.010
- Purple Red #990147 ΔE 0.030
- Cranberry #9E003A ΔE 0.030
- Berry #990F4B ΔE 0.035
- Mulberry #920A4E ΔE 0.036
- Wine #80013F ΔE 0.041
- Red Purple #820747 ΔE 0.042
- Bordeaux #7B002C ΔE 0.050
Use #900337 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.