#900A51
Closest named color: Mulberry (#920A4E). oklch(42.9% 0.169 356.9), rgb(144, 10, 81).
Aa
White text reads best on this color (8.94:1).
About this color
#900A51 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.169 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.007 away. White text reads best on it, at 8.94:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #900A51 |
| RGB | rgb(144, 10, 81) |
| HSL | hsl(328, 87%, 30%) |
| OKLCH | oklch(42.9% 0.169 356.9) |
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 #900A51 | 8.94:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #900A51 | 2.34:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #900A51 text on white | 8.94:1 | AAA | Lc 88.6 | Fine for body text |
| #900A51 text on black | 2.34:1 | Fails | Lc -13.6 | 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
#FDF2F5
oklch(97.1% 0.012 358.8)
-
Step 100
100
#FBE2EA
oklch(93.5% 0.029 356.3)
-
Step 200
200
#F8CBDA
oklch(88.5% 0.054 356.3)
-
Step 300
300
#F5A6C1
oklch(80.9% 0.099 357.4)
-
Step 400
400
#EC72A2
oklch(70.8% 0.158 357.1)
-
Step 500
500
#E1448B
oklch(63% 0.202 357)
-
Step 600
600
#CC1275
oklch(55.5% 0.219 356.9)
-
Step 700
700
#AF0062
oklch(49.1% 0.2 357.1)
-
Step 800
800 (this color)
#900A51
oklch(42.9% 0.169 356.9)
-
Step 900
900
#731743
oklch(37.7% 0.131 356.7)
-
Step 950
950
#441027
oklch(27% 0.083 357.1)
#900A51 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) | #2F3A52 | 0.194 |
| Deuteranopia (no green cones) | #53524E | 0.170 |
| Tritanopia (no blue cones) | #9D002F | 0.060 |
| Achromatopsia (no color) | #494949 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900A51
#900A51
oklch(42.9% 0.169 356.9)
- #005E4F
#005E4F
oklch(43.1% 0.08 176.9)
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 #900A51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.007
- Berry #990F4B ΔE 0.025
- Purple Red #990147 ΔE 0.025
- Dark Fuchsia #9D0759 ΔE 0.030
- Red Purple #820747 ΔE 0.034
- Deep Magenta #A0025C ΔE 0.037
- Violet Red #A50055 ΔE 0.044
- Wine #80013F ΔE 0.045
Use #900A51 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.