#B43B31
Closest named color: Dull Red (#BB3F3F). oklch(52.6% 0.159 28.4), rgb(180, 59, 49).
Aa
White text reads best on this color (5.81:1).
About this color
#B43B31 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.159 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.81:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.159) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #B43B31 |
| RGB | rgb(180, 59, 49) |
| HSL | hsl(5, 57%, 45%) |
| OKLCH | oklch(52.6% 0.159 28.4) |
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 #B43B31 | 5.81:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #B43B31 | 3.61:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #B43B31 text on white | 5.81:1 | AA | Lc 78.1 | Fine for body text |
| #B43B31 text on black | 3.61:1 | AA large text | Lc -23.7 | 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 600.
-
Step 50
50
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CB
oklch(88.5% 0.039 27.8)
-
Step 300
300
#EBB0A7
oklch(80.9% 0.071 28.6)
-
Step 400
400
#DF8478
oklch(70.8% 0.114 28.3)
-
Step 500
500
#D36255
oklch(63.1% 0.145 28.5)
-
Step 600
600 (this color)
#B43B31
oklch(52.6% 0.159 28.4)
-
Step 700
700
#A4352C
oklch(49.1% 0.148 28.3)
-
Step 800
800
#852D25
oklch(42.6% 0.122 28.5)
-
Step 900
900
#6B2A23
oklch(37.7% 0.095 28.5)
-
Step 950
950
#3F1915
oklch(26.9% 0.06 27.9)
#B43B31 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) | #5D542F | 0.167 |
| Deuteranopia (no green cones) | #7B6F2D | 0.154 |
| Tritanopia (no blue cones) | #C6193A | 0.052 |
| Achromatopsia (no color) | #656565 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43B31
#B43B31
oklch(52.6% 0.159 28.4)
- #007986
#007986
oklch(52.7% 0.091 207.9)
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 #B43B31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Rusty Red #AF2F0D ΔE 0.032
- Sinopia #BB3E03 ΔE 0.035
- Firebrick #B22222 ΔE 0.036
- Dusty Red #B9484E ΔE 0.039
- Rufous #AE2012 ΔE 0.045
- Brick #A03623 ΔE 0.045
- Brown #A52A2A ΔE 0.046
Use #B43B31 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.