#900B4F
Closest named color: Mulberry (#920A4E). oklch(42.9% 0.168 358.1), rgb(144, 11, 79).
Aa
White text reads best on this color (8.94:1).
About this color
#900B4F is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.168 and its hue 358°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.005 away. White text reads best on it, at 8.94:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.168) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #900B4F |
| RGB | rgb(144, 11, 79) |
| HSL | hsl(329, 86%, 30%) |
| OKLCH | oklch(42.9% 0.168 358.1) |
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 #900B4F | 8.94:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #900B4F | 2.34:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #900B4F text on white | 8.94:1 | AAA | Lc 88.7 | Fine for body text |
| #900B4F text on black | 2.34:1 | 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
#F5A6C0
oklch(80.9% 0.098 358.2)
-
Step 400
400
#EC72A0
oklch(70.7% 0.158 358.1)
-
Step 500
500
#E14589
oklch(63.1% 0.2 357.9)
-
Step 600
600
#CD1473
oklch(55.7% 0.218 358)
-
Step 700
700
#B00060
oklch(49.2% 0.2 358.2)
-
Step 800
800 (this color)
#900B4F
oklch(42.9% 0.168 358.1)
-
Step 900
900
#731741
oklch(37.7% 0.13 358.1)
-
Step 950
950
#441026
oklch(27% 0.083 358.3)
#900B4F 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) | #303A50 | 0.192 |
| Deuteranopia (no green cones) | #53524C | 0.170 |
| Tritanopia (no blue cones) | #9D002E | 0.058 |
| Achromatopsia (no color) | #494949 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900B4F
#900B4F
oklch(42.9% 0.168 358.1)
- #005D50
#005D50
oklch(42.8% 0.078 178.9)
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 #900B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.005
- Purple Red #990147 ΔE 0.023
- Berry #990F4B ΔE 0.023
- Dark Fuchsia #9D0759 ΔE 0.031
- Red Purple #820747 ΔE 0.033
- Deep Magenta #A0025C ΔE 0.038
- Red Wine #8C0034 ΔE 0.042
- Wine #80013F ΔE 0.043
Use #900B4F 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.