#B81E31
Closest named color: Lipstick Red (#C0022F). oklch(50.7% 0.187 21.7), rgb(184, 30, 49).
Aa
White text reads best on this color (6.42:1).
About this color
#B81E31 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.187 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.019 away. White text reads best on it, at 6.42:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #B81E31 |
| RGB | rgb(184, 30, 49) |
| HSL | hsl(353, 72%, 42%) |
| OKLCH | oklch(50.7% 0.187 21.7) |
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 #B81E31 | 6.42:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #B81E31 | 3.26:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #B81E31 text on white | 6.42:1 | AA | Lc 80.1 | Fine for body text |
| #B81E31 text on black | 3.26:1 | AA large text | Lc -21.7 | 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
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F6AAA7
oklch(81% 0.09 21.8)
-
Step 400
400
#ED7878
oklch(70.7% 0.145 21.4)
-
Step 500
500
#E34E55
oklch(63% 0.185 21.5)
-
Step 600
600
#CF273A
oklch(55.6% 0.201 21.7)
-
Step 700
700 (this color)
#B81E31
oklch(50.7% 0.187 21.7)
-
Step 800
800
#911826
oklch(42.8% 0.155 21.5)
-
Step 900
900
#741D23
oklch(37.6% 0.12 21.5)
-
Step 950
950
#451315
oklch(27.1% 0.077 21.6)
#B81E31 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) | #504A30 | 0.206 |
| Deuteranopia (no green cones) | #766A2B | 0.187 |
| Tritanopia (no blue cones) | #CB0027 | 0.037 |
| Achromatopsia (no color) | #5F5F5F | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B81E31
#B81E31
oklch(50.7% 0.187 21.7)
- #00747A
#00747A
oklch(50.8% 0.086 201.1)
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 #B81E31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.019
- Firebrick #B22222 ΔE 0.021
- Scarlet #BE0119 ΔE 0.024
- Rose Red #BE013C ΔE 0.026
- Rufous #AE2012 ΔE 0.035
- Rouge #AB1239 ΔE 0.036
- Brown #A52A2A ΔE 0.040
- Rusty Red #AF2F0D ΔE 0.044
Use #B81E31 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.