#900B53
Closest named color: Mulberry (#920A4E). oklch(43.1% 0.169 355.9), rgb(144, 11, 83).
Aa
White text reads best on this color (8.90:1).
About this color
#900B53 is a dark, vivid red. In OKLCH its lightness is 43%, its chroma 0.169 and its hue 356°. Its hue sits on the warm side of the wheel. The nearest named color is Mulberry (#920A4E), ΔE 0.010 away. White text reads best on it, at 8.90:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Mulberry (#920A4E) |
| Black text | 2.35:1 |
| White text | 8.90:1 |
Values
| HEX | #900B53 |
| RGB | rgb(144, 11, 83) |
| HSL | hsl(328, 86%, 30%) |
| OKLCH | oklch(43.1% 0.169 355.9) |
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 #900B53 | 8.90:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #900B53 | 2.35:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #900B53 text on white | 8.90:1 | AAA | Lc 88.5 | Fine for body text |
| #900B53 text on black | 2.35:1 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
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
#F5A6C3
oklch(81% 0.099 355.9)
-
Step 400
400
#EB72A4
oklch(70.7% 0.158 355.9)
-
Step 500
500
#E1448E
oklch(63.1% 0.203 355.7)
-
Step 600
600
#CC1278
oklch(55.6% 0.22 355.7)
-
Step 700
700
#AF0064
oklch(49.1% 0.201 356.2)
-
Step 800
800 (this color)
#900B53
oklch(43.1% 0.169 355.9)
-
Step 900
900
#731744
oklch(37.8% 0.132 355.9)
-
Step 950
950
#441028
oklch(27.1% 0.084 355.8)
#900B53 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) | #2F3B55 | 0.193 |
| Deuteranopia (no green cones) | #535250 | 0.170 |
| Tritanopia (no blue cones) | #9C0030 | 0.060 |
| Achromatopsia (no color) | #4A4A4A | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #900B53
#900B53
oklch(43.1% 0.169 355.9)
- #005E4E
#005E4E
oklch(43% 0.081 175.8)
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 #900B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mulberry #920A4E ΔE 0.010
- Berry #990F4B ΔE 0.027
- Purple Red #990147 ΔE 0.027
- Dark Fuchsia #9D0759 ΔE 0.029
- Deep Magenta #A0025C ΔE 0.036
- Red Purple #820747 ΔE 0.036
- Red Violet #9E0168 ΔE 0.044
- Violet Red #A50055 ΔE 0.044
Use #900B53 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.