#900638
Closest named color: Red Wine (#8C0034). oklch(42% 0.164 10.1), rgb(144, 6, 56).
Aa
White text reads best on this color (9.25:1).
About this color
#900638 is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.164 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Red Wine (#8C0034), ΔE 0.012 away. White text reads best on it, at 9.25:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Red Wine (#8C0034) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #900638 |
| RGB | rgb(144, 6, 56) |
| HSL | hsl(338, 92%, 29%) |
| OKLCH | oklch(42% 0.164 10.1) |
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 #900638 | 9.25:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #900638 | 2.26:1 | Fails | Lc 14.7 | Not readable |
| #900638 text on white | 9.25:1 | AAA | Lc 89.3 | Fine for body text |
| #900638 text on black | 2.26:1 | Fails | Lc -13.0 | 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
#F7A7B2
oklch(80.9% 0.095 10.4)
-
Step 400
400
#EF738A
oklch(70.7% 0.154 10.2)
-
Step 500
500
#E6466E
oklch(63.2% 0.197 10.1)
-
Step 600
600
#D11556
oklch(55.6% 0.214 10.1)
-
Step 700
700
#B30046
oklch(49% 0.196 10.2)
-
Step 800
800 (this color)
#900638
oklch(42% 0.164 10.1)
-
Step 900
900
#761832
oklch(37.8% 0.128 10)
-
Step 950
950
#45101D
oklch(26.9% 0.081 9.9)
#900638 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) | #363639 | 0.185 |
| Deuteranopia (no green cones) | #575035 | 0.167 |
| Tritanopia (no blue cones) | #9E0020 | 0.044 |
| Achromatopsia (no color) | #474747 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900638
#900638
oklch(42% 0.164 10.1)
- #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 #900638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Wine #8C0034 ΔE 0.012
- Purple Red #990147 ΔE 0.029
- Cranberry #9E003A ΔE 0.030
- Berry #990F4B ΔE 0.034
- Mulberry #920A4E ΔE 0.034
- Wine #80013F ΔE 0.041
- Red Purple #820747 ΔE 0.042
- Bordeaux #7B002C ΔE 0.051
Use #900638 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.