#B51D71
Closest named color: Medium Violet Red (#C71585). oklch(51.8% 0.196 353.4), rgb(181, 29, 113).
Aa
White text reads best on this color (6.21:1).
About this color
#B51D71 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.196 and its hue 353°. Its hue sits on the warm side of the wheel. The nearest named color is Medium Violet Red (#C71585), ΔE 0.046 away. White text reads best on it, at 6.21:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Medium Violet Red (#C71585) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #B51D71 |
| RGB | rgb(181, 29, 113) |
| HSL | hsl(327, 72%, 41%) |
| OKLCH | oklch(51.8% 0.196 353.4) |
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 #B51D71 | 6.21:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #B51D71 | 3.37:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #B51D71 text on white | 6.21:1 | AA | Lc 79.3 | Fine for body text |
| #B51D71 text on black | 3.37:1 | AA large text | Lc -22.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE3EB
oklch(93.7% 0.027 354.5)
-
Step 200
200
#F6CBDC
oklch(88.4% 0.053 352.5)
-
Step 300
300
#F2A7C5
oklch(80.9% 0.096 353.8)
-
Step 400
400
#E775A8
oklch(70.8% 0.151 353.5)
-
Step 500
500
#DC4A93
oklch(63.1% 0.194 353.3)
-
Step 600
600
#C7217D
oklch(55.6% 0.211 353.3)
-
Step 700
700 (this color)
#B51D71
oklch(51.8% 0.196 353.4)
-
Step 800
800
#8B1356
oklch(42.6% 0.162 353.2)
-
Step 900
900
#701B47
oklch(37.7% 0.126 353.2)
-
Step 950
950
#421229
oklch(27% 0.079 354)
#B51D71 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) | #3F4F73 | 0.222 |
| Deuteranopia (no green cones) | #696A6E | 0.195 |
| Tritanopia (no blue cones) | #C40046 | 0.070 |
| Achromatopsia (no color) | #616161 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B51D71
#B51D71
oklch(51.8% 0.196 353.4)
- #007A63
#007A63
oklch(51.7% 0.099 173.4)
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 #B51D71, closest first.
No curated palette has a color within ΔE 0.04 of #B51D71.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Violet Red #C71585 ΔE 0.046
- Violet Red #A50055 ΔE 0.056
- Red Violet #9E0168 ΔE 0.058
- Deep Magenta #A0025C ΔE 0.058
- Raspberry #B00149 ΔE 0.060
- Dark Fuchsia #9D0759 ΔE 0.064
- Light Burgundy #A8415B ΔE 0.072
- Dark Hot Pink #D90166 ΔE 0.074
Use #B51D71 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.