#B81831
Closest named color: Lipstick Red (#C0022F). oklch(50.4% 0.19 20.9), rgb(184, 24, 49).
Aa
White text reads best on this color (6.53:1).
About this color
#B81831 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.190 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.017 away. White text reads best on it, at 6.53:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.190) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #B81831 |
| RGB | rgb(184, 24, 49) |
| HSL | hsl(351, 77%, 41%) |
| OKLCH | oklch(50.4% 0.19 20.9) |
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 #B81831 | 6.53:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #B81831 | 3.21:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #B81831 text on white | 6.53:1 | AA | Lc 80.4 | Fine for body text |
| #B81831 text on black | 3.21:1 | AA large text | Lc -21.4 | 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
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CCCB
oklch(88.4% 0.051 19.7)
-
Step 300
300
#F6A9A7
oklch(80.8% 0.091 20.9)
-
Step 400
400
#EE7778
oklch(70.7% 0.147 21)
-
Step 500
500
#E54C56
oklch(63.1% 0.189 20.8)
-
Step 600
600
#D0233B
oklch(55.6% 0.204 20.9)
-
Step 700
700 (this color)
#B81831
oklch(50.4% 0.19 20.9)
-
Step 800
800
#921526
oklch(42.7% 0.158 21.1)
-
Step 900
900
#751C24
oklch(37.7% 0.122 20.6)
-
Step 950
950
#451215
oklch(26.9% 0.078 20.8)
#B81831 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) | #4E4830 | 0.211 |
| Deuteranopia (no green cones) | #75692B | 0.191 |
| Tritanopia (no blue cones) | #CB0024 | 0.039 |
| Achromatopsia (no color) | #5D5D5D | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B81831
#B81831
oklch(50.4% 0.19 20.9)
- #007378
#007378
oklch(50.5% 0.086 200.1)
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 #B81831, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.017
- Rose Red #BE013C ΔE 0.022
- Firebrick #B22222 ΔE 0.023
- Scarlet #BE0119 ΔE 0.023
- Rouge #AB1239 ΔE 0.032
- Rufous #AE2012 ΔE 0.036
- Brown #A52A2A ΔE 0.041
- Cherry #CF0234 ΔE 0.046
Use #B81831 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.