#900550
Closest named color: Mulberry (#920A4E). oklch(42.7% 0.171 357.2), rgb(144, 5, 80).
Aa
White text reads best on this color (9.03:1).
About this color
#900550 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.171 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.008 away. White text reads best on it, at 9.03:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.32:1 |
| White text | 9.03:1 |
Values
| HEX | #900550 |
| RGB | rgb(144, 5, 80) |
| HSL | hsl(328, 93%, 29%) |
| OKLCH | oklch(42.7% 0.171 357.2) |
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 #900550 | 9.03:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #900550 | 2.32:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #900550 text on white | 9.03:1 | AAA | Lc 88.7 | Fine for body text |
| #900550 text on black | 2.32:1 | Fails | Lc -13.5 | 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
#FEF2F5
oklch(97.1% 0.013 0.3)
-
Step 100
100
#FBE2EA
oklch(93.5% 0.029 356.3)
-
Step 200
200
#F9CBD9
oklch(88.6% 0.055 358.1)
-
Step 300
300
#F6A5C1
oklch(80.9% 0.101 357.3)
-
Step 400
400
#EC71A2
oklch(70.7% 0.16 356.9)
-
Step 500
500
#E2438B
oklch(63.1% 0.204 357)
-
Step 600
600
#CE0C75
oklch(55.7% 0.223 357.1)
-
Step 700
700
#AF0062
oklch(49.1% 0.2 357.1)
-
Step 800
800 (this color)
#900550
oklch(42.7% 0.171 357.2)
-
Step 900
900
#741542
oklch(37.7% 0.134 357.4)
-
Step 950
950
#440F27
oklch(26.9% 0.085 356.7)
#900550 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) | #2E3951 | 0.196 |
| Deuteranopia (no green cones) | #53514D | 0.171 |
| Tritanopia (no blue cones) | #9D002D | 0.062 |
| Achromatopsia (no color) | #494949 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900550
#900550
oklch(42.7% 0.171 357.2)
- #005D4E
#005D4E
oklch(42.8% 0.079 176.7)
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 #900550, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.008
- Purple Red #990147 ΔE 0.025
- Berry #990F4B ΔE 0.026
- Dark Fuchsia #9D0759 ΔE 0.031
- Red Purple #820747 ΔE 0.033
- Deep Magenta #A0025C ΔE 0.038
- Wine #80013F ΔE 0.043
- Red Wine #8C0034 ΔE 0.044
Use #900550 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.