#B43A2A
Closest named color: Rusty Red (#AF2F0D). oklch(52.4% 0.161 30.6), rgb(180, 58, 42).
Aa
White text reads best on this color (5.86:1).
About this color
#B43A2A is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.161 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.027 away. White text reads best on it, at 5.86:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.57:1 |
| White text | 5.86:1 |
Values
| HEX | #B43A2A |
| RGB | rgb(180, 58, 42) |
| HSL | hsl(7, 62%, 44%) |
| OKLCH | oklch(52.4% 0.161 30.6) |
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 #B43A2A | 5.86:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #B43A2A | 3.57:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #B43A2A text on white | 5.86:1 | AA | Lc 78.3 | Fine for body text |
| #B43A2A text on black | 3.57:1 | AA large text | Lc -23.5 | 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
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F3D0C9
oklch(88.5% 0.041 31.2)
-
Step 300
300
#ECB0A5
oklch(81% 0.072 30.5)
-
Step 400
400
#DF8474
oklch(70.7% 0.115 30.8)
-
Step 500
500
#D46250
oklch(63.2% 0.148 30.8)
-
Step 600
600 (this color)
#B43A2A
oklch(52.4% 0.161 30.6)
-
Step 700
700
#A43526
oklch(49% 0.149 30.7)
-
Step 800
800
#862D21
oklch(42.8% 0.124 30.5)
-
Step 900
900
#6C2A20
oklch(37.8% 0.097 30.8)
-
Step 950
950
#3F1913
oklch(26.9% 0.061 30.7)
#B43A2A 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) | #5D5427 | 0.169 |
| Deuteranopia (no green cones) | #7B6E25 | 0.154 |
| Tritanopia (no blue cones) | #C61437 | 0.055 |
| Achromatopsia (no color) | #656565 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43A2A
#B43A2A
oklch(52.4% 0.161 30.6)
- #007887
#007887
oklch(52.5% 0.091 209.9)
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 #B43A2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.027
- Dull Red #BB3F3F ΔE 0.027
- Sinopia #BB3E03 ΔE 0.030
- Firebrick #B22222 ΔE 0.035
- Rufous #AE2012 ΔE 0.042
- Rust Red #AA2704 ΔE 0.042
- Brick #A03623 ΔE 0.043
- Dusty Red #B9484E ΔE 0.044
Use #B43A2A 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.