#900D5B
Closest named color: Mulberry (#920A4E). oklch(43.4% 0.172 351.8), rgb(144, 13, 91).
Aa
White text reads best on this color (8.77:1).
About this color
#900D5B is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.172 and its hue 352°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.022 away. White text reads best on it, at 8.77:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #900D5B |
| RGB | rgb(144, 13, 91) |
| HSL | hsl(324, 83%, 31%) |
| OKLCH | oklch(43.4% 0.172 351.8) |
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 #900D5B | 8.77:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #900D5B | 2.39:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #900D5B text on white | 8.77:1 | AAA | Lc 88.2 | Fine for body text |
| #900D5B text on black | 2.39:1 | Fails | Lc -13.9 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE2EC
oklch(93.5% 0.029 350.5)
-
Step 200
200
#F8CBDD
oklch(88.6% 0.056 352.3)
-
Step 300
300
#F3A6C8
oklch(80.9% 0.1 351.5)
-
Step 400
400
#E972AB
oklch(70.7% 0.159 351.9)
-
Step 500
500
#DF4497
oklch(63.1% 0.205 351.7)
-
Step 600
600
#CA1181
oklch(55.6% 0.223 351.8)
-
Step 700
700
#AD006D
oklch(49.1% 0.204 351.8)
-
Step 800
800 (this color)
#900D5B
oklch(43.4% 0.172 351.8)
-
Step 900
900
#721649
oklch(37.7% 0.134 351.9)
-
Step 950
950
#43102B
oklch(27% 0.084 351.6)
#900D5B 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) | #2C3C5D | 0.196 |
| Deuteranopia (no green cones) | #515358 | 0.171 |
| Tritanopia (no blue cones) | #9C0035 | 0.066 |
| Achromatopsia (no color) | #4B4B4B | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900D5B
#900D5B
oklch(43.4% 0.172 351.8)
- #00604B
#00604B
oklch(43.5% 0.085 171.1)
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 #900D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.022
- Dark Fuchsia #9D0759 ΔE 0.028
- Deep Magenta #A0025C ΔE 0.033
- Red Violet #9E0168 ΔE 0.035
- Berry #990F4B ΔE 0.036
- Purple Red #990147 ΔE 0.038
- Red Purple #820747 ΔE 0.043
- Violet Red #A50055 ΔE 0.046
Use #900D5B 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.