#B43B22
Closest named color: Sinopia (#BB3E03). oklch(52.4% 0.161 33.4), rgb(180, 59, 34).
Aa
White text reads best on this color (5.85:1).
About this color
#B43B22 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.161 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.023 away. White text reads best on it, at 5.85:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #B43B22 |
| RGB | rgb(180, 59, 34) |
| HSL | hsl(10, 68%, 42%) |
| OKLCH | oklch(52.4% 0.161 33.4) |
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 #B43B22 | 5.85:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #B43B22 | 3.58:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #B43B22 text on white | 5.85:1 | AA | Lc 78.2 | Fine for body text |
| #B43B22 text on black | 3.58:1 | AA large text | Lc -23.6 | 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 600.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F3D0C8
oklch(88.5% 0.041 33)
-
Step 300
300
#ECB0A2
oklch(80.9% 0.073 33.5)
-
Step 400
400
#DF8470
oklch(70.6% 0.117 33.3)
-
Step 500
500
#D4624A
oklch(63.1% 0.149 33.4)
-
Step 600
600 (this color)
#B43B22
oklch(52.4% 0.161 33.4)
-
Step 700
700
#A4361F
oklch(49.1% 0.149 33.5)
-
Step 800
800
#852E1C
oklch(42.6% 0.123 33.5)
-
Step 900
900
#6C2A1D
oklch(37.8% 0.097 32.9)
-
Step 950
950
#3F1A11
oklch(27% 0.06 34.9)
#B43B22 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) | #5E541E | 0.167 |
| Deuteranopia (no green cones) | #7C6F1D | 0.153 |
| Tritanopia (no blue cones) | #C61536 | 0.060 |
| Achromatopsia (no color) | #656565 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43B22
#B43B22
oklch(52.4% 0.161 33.4)
- #00778A
#00778A
oklch(52.3% 0.092 213.9)
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 #B43B22, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.023
- Rusty Red #AF2F0D ΔE 0.025
- Dull Red #BB3F3F ΔE 0.033
- Firebrick #B22222 ΔE 0.038
- Rust Red #AA2704 ΔE 0.042
- Rufous #AE2012 ΔE 0.043
- Brick #A03623 ΔE 0.044
- Russet #A13905 ΔE 0.044
Use #B43B22 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.