#B81B38
Closest named color: Rose Red (#BE013C). oklch(50.7% 0.188 18.7), rgb(184, 27, 56).
Aa
White text reads best on this color (6.45:1).
About this color
#B81B38 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.188 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Rose Red (#BE013C), ΔE 0.018 away. White text reads best on it, at 6.45:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Rose Red (#BE013C) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #B81B38 |
| RGB | rgb(184, 27, 56) |
| HSL | hsl(349, 74%, 41%) |
| OKLCH | oklch(50.7% 0.188 18.7) |
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 #B81B38 | 6.45:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #B81B38 | 3.25:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #B81B38 text on white | 6.45:1 | AA | Lc 80.2 | Fine for body text |
| #B81B38 text on black | 3.25:1 | AA large text | Lc -21.6 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E3
oklch(93.5% 0.026 17.6)
-
Step 200
200
#F9CCCC
oklch(88.4% 0.051 18.2)
-
Step 300
300
#F6A9AA
oklch(80.9% 0.091 18.4)
-
Step 400
400
#ED777D
oklch(70.6% 0.146 18.4)
-
Step 500
500
#E44D5C
oklch(63.2% 0.186 18.6)
-
Step 600
600
#CF2542
oklch(55.6% 0.202 18.7)
-
Step 700
700 (this color)
#B81B38
oklch(50.7% 0.188 18.7)
-
Step 800
800
#91162B
oklch(42.7% 0.156 18.8)
-
Step 900
900
#741C27
oklch(37.6% 0.121 18.5)
-
Step 950
950
#451317
oklch(27.1% 0.077 19.3)
#B81B38 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) | #4E4938 | 0.209 |
| Deuteranopia (no green cones) | #756A33 | 0.190 |
| Tritanopia (no blue cones) | #CA0029 | 0.037 |
| Achromatopsia (no color) | #5E5E5E | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B81B38
#B81B38
oklch(50.7% 0.188 18.7)
- #007477
#007477
oklch(50.7% 0.086 197.9)
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 #B81B38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rose Red #BE013C ΔE 0.018
- Lipstick Red #C0022F ΔE 0.019
- Firebrick #B22222 ΔE 0.029
- Scarlet #BE0119 ΔE 0.030
- Rouge #AB1239 ΔE 0.031
- Raspberry #B00149 ΔE 0.041
- Ruby #CA0147 ΔE 0.042
- Rufous #AE2012 ΔE 0.043
Use #B81B38 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.