#B91F37
Closest named color: Lipstick Red (#C0022F). oklch(51.1% 0.186 19.7), rgb(185, 31, 55).
Aa
White text reads best on this color (6.33:1).
About this color
#B91F37 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.186 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.018 away. White text reads best on it, at 6.33:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.186) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #B91F37 |
| RGB | rgb(185, 31, 55) |
| HSL | hsl(351, 71%, 42%) |
| OKLCH | oklch(51.1% 0.186 19.7) |
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 #B91F37 | 6.33:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #B91F37 | 3.31:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #B91F37 text on white | 6.33:1 | AA | Lc 79.8 | Fine for body text |
| #B91F37 text on black | 3.31:1 | AA large text | Lc -22.0 | 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
#F9CDCC
oklch(88.6% 0.05 19.7)
-
Step 300
300
#F6A9A9
oklch(80.9% 0.091 19.2)
-
Step 400
400
#ED787B
oklch(70.8% 0.144 19.8)
-
Step 500
500
#E34E5A
oklch(63.1% 0.184 19.6)
-
Step 600
600
#CE2740
oklch(55.6% 0.2 19.6)
-
Step 700
700 (this color)
#B91F37
oklch(51.1% 0.186 19.7)
-
Step 800
800
#91172A
oklch(42.8% 0.155 19.5)
-
Step 900
900
#741D26
oklch(37.7% 0.12 19.6)
-
Step 950
950
#451316
oklch(27.1% 0.077 20.4)
#B91F37 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) | #504B37 | 0.207 |
| Deuteranopia (no green cones) | #766B32 | 0.188 |
| Tritanopia (no blue cones) | #CC002A | 0.038 |
| Achromatopsia (no color) | #606060 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B91F37
#B91F37
oklch(51.1% 0.186 19.7)
- #00757A
#00757A
oklch(51.1% 0.087 200)
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 #B91F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.018
- Rose Red #BE013C ΔE 0.021
- Firebrick #B22222 ΔE 0.027
- Scarlet #BE0119 ΔE 0.029
- Rouge #AB1239 ΔE 0.036
- Ruby #CA0147 ΔE 0.042
- Rufous #AE2012 ΔE 0.042
- Cherry #CF0234 ΔE 0.043
Use #B91F37 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.