#B51F55
Closest named color: Raspberry (#B00149). oklch(51% 0.185 6.3), rgb(181, 31, 85).
Aa
White text reads best on this color (6.37:1).
About this color
#B51F55 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.185 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Raspberry (#B00149), ΔE 0.027 away. White text reads best on it, at 6.37:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Raspberry (#B00149) |
| Black text | 3.29:1 |
| White text | 6.37:1 |
Values
| HEX | #B51F55 |
| RGB | rgb(181, 31, 85) |
| HSL | hsl(338, 71%, 42%) |
| OKLCH | oklch(51% 0.185 6.3) |
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 #B51F55 | 6.37:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #B51F55 | 3.29:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #B51F55 text on white | 6.37:1 | AA | Lc 80.1 | Fine for body text |
| #B51F55 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
#F3A9B7
oklch(80.9% 0.089 6.8)
-
Step 400
400
#E97792
oklch(70.6% 0.143 6.4)
-
Step 500
500
#DF4D78
oklch(63.1% 0.184 6.1)
-
Step 600
600
#CA2761
oklch(55.6% 0.199 6.1)
-
Step 700
700 (this color)
#B51F55
oklch(51% 0.185 6.3)
-
Step 800
800
#8E1841
oklch(42.8% 0.153 6.7)
-
Step 900
900
#721D37
oklch(37.7% 0.119 6.6)
-
Step 950
950
#431320
oklch(27% 0.075 7)
#B51F55 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) | #494C56 | 0.209 |
| Deuteranopia (no green cones) | #706A51 | 0.190 |
| Tritanopia (no blue cones) | #C60038 | 0.050 |
| Achromatopsia (no color) | #5F5F5F | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B51F55
#B51F55
oklch(51% 0.185 6.3)
- #00766E
#00766E
oklch(50.9% 0.089 186.6)
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 #B51F55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raspberry #B00149 ΔE 0.027
- Rose Red #BE013C ΔE 0.037
- Rouge #AB1239 ΔE 0.044
- Ruby #CA0147 ΔE 0.045
- Violet Red #A50055 ΔE 0.047
- Light Burgundy #A8415B ΔE 0.050
- Lipstick Red #C0022F ΔE 0.052
- Deep Magenta #A0025C ΔE 0.060
Use #B51F55 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.