#B51F57
Closest named color: Raspberry (#B00149). oklch(51% 0.186 5.4), rgb(181, 31, 87).
Aa
White text reads best on this color (6.36:1).
About this color
#B51F57 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.186 and its hue 5°. Its hue sits on the warm side of the wheel. The nearest named color is Raspberry (#B00149), ΔE 0.028 away. White text reads best on it, at 6.36:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.186) |
| Temperature | warm |
| Nearest name | Raspberry (#B00149) |
| Black text | 3.29:1 |
| White text | 6.36:1 |
Values
| HEX | #B51F57 |
| RGB | rgb(181, 31, 87) |
| HSL | hsl(338, 71%, 42%) |
| OKLCH | oklch(51% 0.186 5.4) |
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 #B51F57 | 6.36:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #B51F57 | 3.29:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #B51F57 text on white | 6.36:1 | AA | Lc 80.0 | Fine for body text |
| #B51F57 text on black | 3.29:1 | AA large text | Lc -21.8 | 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
#FDF2F4
oklch(97% 0.012 4.7)
-
Step 100
100
#FAE3E7
oklch(93.6% 0.026 5.7)
-
Step 200
200
#F7CCD4
oklch(88.4% 0.05 5.6)
-
Step 300
300
#F3A8B8
oklch(80.8% 0.09 5.3)
-
Step 400
400
#E97794
oklch(70.7% 0.143 5.3)
-
Step 500
500
#DF4D7A
oklch(63.1% 0.184 5.2)
-
Step 600
600
#CA2763
oklch(55.6% 0.199 5.3)
-
Step 700
700 (this color)
#B51F57
oklch(51% 0.186 5.4)
-
Step 800
800
#8D1743
oklch(42.6% 0.154 5.2)
-
Step 900
900
#721D38
oklch(37.7% 0.12 5.9)
-
Step 950
950
#431321
oklch(27% 0.075 5.7)
#B51F57 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) | #484C58 | 0.210 |
| Deuteranopia (no green cones) | #6F6A53 | 0.190 |
| Tritanopia (no blue cones) | #C60039 | 0.051 |
| Achromatopsia (no color) | #5F5F5F | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B51F57
#B51F57
oklch(51% 0.186 5.4)
- #00766D
#00766D
oklch(50.9% 0.089 185.6)
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 #B51F57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raspberry #B00149 ΔE 0.028
- Rose Red #BE013C ΔE 0.040
- Ruby #CA0147 ΔE 0.046
- Violet Red #A50055 ΔE 0.046
- Rouge #AB1239 ΔE 0.047
- Light Burgundy #A8415B ΔE 0.051
- Lipstick Red #C0022F ΔE 0.055
- Deep Magenta #A0025C ΔE 0.059
Use #B51F57 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.