#901C57
Closest named color: Mulberry (#920A4E). oklch(44.2% 0.159 355.2), rgb(144, 28, 87).
Aa
White text reads best on this color (8.43:1).
About this color
#901C57 is a dark, vivid red. In OKLCH its lightness is 44%, its chroma 0.159 and its hue 355°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.018 away. White text reads best on it, at 8.43:1.
| Hue family | Reds |
| Lightness | dark (44%) |
| Chroma | vivid (0.159) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.48:1 |
| White text | 8.43:1 |
Values
| HEX | #901C57 |
| RGB | rgb(144, 28, 87) |
| HSL | hsl(329, 67%, 34%) |
| OKLCH | oklch(44.2% 0.159 355.2) |
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 #901C57 | 8.43:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #901C57 | 2.48:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #901C57 text on white | 8.43:1 | AAA | Lc 87.7 | Fine for body text |
| #901C57 text on black | 2.48:1 | Fails | Lc -14.4 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE3EB
oklch(93.7% 0.027 354.5)
-
Step 200
200
#F6CCDB
oklch(88.5% 0.051 354.7)
-
Step 300
300
#F1A8C3
oklch(80.9% 0.092 355.5)
-
Step 400
400
#E776A5
oklch(70.8% 0.148 355.3)
-
Step 500
500
#DC4C8F
oklch(63.2% 0.189 355.2)
-
Step 600
600
#C72579
oklch(55.7% 0.206 355.2)
-
Step 700
700
#AB1366
oklch(49.1% 0.191 355)
-
Step 800
800 (this color)
#901C57
oklch(44.2% 0.159 355.2)
-
Step 900
900
#701C45
oklch(37.7% 0.124 354.9)
-
Step 950
950
#421228
oklch(27% 0.078 355.3)
#901C57 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) | #354058 | 0.179 |
| Deuteranopia (no green cones) | #555554 | 0.159 |
| Tritanopia (no blue cones) | #9C0A37 | 0.054 |
| Achromatopsia (no color) | #4D4D4D | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #901C57
#901C57
oklch(44.2% 0.159 355.2)
- #006250
#006250
oklch(44.3% 0.084 174.4)
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 #901C57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.018
- Berry #990F4B ΔE 0.026
- Dark Fuchsia #9D0759 ΔE 0.028
- Purple Red #990147 ΔE 0.032
- Deep Magenta #A0025C ΔE 0.035
- Red Violet #9E0168 ΔE 0.043
- Violet Red #A50055 ΔE 0.043
- Red Purple #820747 ΔE 0.045
Use #901C57 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.