#900143
Closest named color: Mulberry (#920A4E). oklch(42.1% 0.169 3.8), rgb(144, 1, 67).
Aa
White text reads best on this color (9.24:1).
About this color
#900143 is a dark, vivid red. In OKLCH its lightness is 42%, its chroma 0.169 and its hue 4°. 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 9.24:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #900143 |
| RGB | rgb(144, 1, 67) |
| HSL | hsl(332, 99%, 28%) |
| OKLCH | oklch(42.1% 0.169 3.8) |
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 #900143 | 9.24:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #900143 | 2.27:1 | Fails | Lc 14.9 | Not readable |
| #900143 text on white | 9.24:1 | AAA | Lc 89.1 | Fine for body text |
| #900143 text on black | 2.27:1 | Fails | Lc -13.2 | 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
#FEF2F4
oklch(97.1% 0.013 5.8)
-
Step 100
100
#FCE2E8
oklch(93.6% 0.03 2)
-
Step 200
200
#FACBD5
oklch(88.6% 0.055 4)
-
Step 300
300
#F7A6B9
oklch(80.9% 0.098 4.2)
-
Step 400
400
#EF7195
oklch(70.7% 0.159 4)
-
Step 500
500
#E5437C
oklch(63.1% 0.202 3.7)
-
Step 600
600
#D00C65
oklch(55.5% 0.219 3.7)
-
Step 700
700
#B20054
oklch(49.2% 0.198 3.9)
-
Step 800
800 (this color)
#900143
oklch(42.1% 0.169 3.8)
-
Step 900
900
#75153A
oklch(37.6% 0.132 3.4)
-
Step 950
950
#450F22
oklch(26.9% 0.084 3.3)
#900143 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) | #313744 | 0.194 |
| Deuteranopia (no green cones) | #555040 | 0.171 |
| Tritanopia (no blue cones) | #9E0025 | 0.055 |
| Achromatopsia (no color) | #474747 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900143
#900143
oklch(42.1% 0.169 3.8)
- #005A52
#005A52
oklch(42% 0.074 184.5)
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 #900143, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.018
- Purple Red #990147 ΔE 0.020
- Red Wine #8C0034 ΔE 0.024
- Berry #990F4B ΔE 0.025
- Red Purple #820747 ΔE 0.032
- Cranberry #9E003A ΔE 0.035
- Wine #80013F ΔE 0.036
- Dark Fuchsia #9D0759 ΔE 0.043
Use #900143 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.