#B43F40
Closest named color: Dull Red (#BB3F3F). oklch(53.3% 0.152 23.4), rgb(180, 63, 64).
Aa
White text reads best on this color (5.63:1).
About this color
#B43F40 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.152 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.014 away. White text reads best on it, at 5.63:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.152) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #B43F40 |
| RGB | rgb(180, 63, 64) |
| HSL | hsl(359, 48%, 48%) |
| OKLCH | oklch(53.3% 0.152 23.4) |
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 #B43F40 | 5.63:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #B43F40 | 3.72:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #B43F40 text on white | 5.63:1 | AA | Lc 77.3 | Fine for body text |
| #B43F40 text on black | 3.72:1 | AA large text | Lc -24.5 | 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
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CD
oklch(88.5% 0.039 23.9)
-
Step 300
300
#EAB0AC
oklch(80.9% 0.068 23.2)
-
Step 400
400
#DD8480
oklch(70.7% 0.11 23)
-
Step 500
500
#D16360
oklch(63.2% 0.14 23.5)
-
Step 600
600 (this color)
#B43F40
oklch(53.3% 0.152 23.4)
-
Step 700
700
#A23738
oklch(49.2% 0.142 23.4)
-
Step 800
800
#832E2F
oklch(42.6% 0.117 22.9)
-
Step 900
900
#6A2A29
oklch(37.6% 0.092 23.4)
-
Step 950
950
#3E1A19
oklch(27% 0.057 23.2)
#B43F40 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) | #5E573F | 0.163 |
| Deuteranopia (no green cones) | #7B713D | 0.152 |
| Tritanopia (no blue cones) | #C52441 | 0.045 |
| Achromatopsia (no color) | #676767 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43F40
#B43F40
oklch(53.3% 0.152 23.4)
- #007C84
#007C84
oklch(53.4% 0.091 202.7)
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 #B43F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.014
- Dusty Red #B9484E ΔE 0.024
- Dark Rose #B5485D ΔE 0.038
- Light Maroon #A24857 ΔE 0.044
- Light Burgundy #A8415B ΔE 0.044
- Firebrick #B22222 ΔE 0.046
- Rusty Red #AF2F0D ΔE 0.048
- Sinopia #BB3E03 ΔE 0.048
Use #B43F40 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.