#B52C11
Closest named color: Rusty Red (#AF2F0D). oklch(50.9% 0.177 32.7), rgb(181, 44, 17).
Aa
White text reads best on this color (6.30:1).
About this color
#B52C11 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.177 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.012 away. White text reads best on it, at 6.30:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #B52C11 |
| RGB | rgb(181, 44, 17) |
| HSL | hsl(10, 83%, 39%) |
| OKLCH | oklch(50.9% 0.177 32.7) |
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 #B52C11 | 6.30:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #B52C11 | 3.33:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #B52C11 text on white | 6.30:1 | AA | Lc 79.9 | Fine for body text |
| #B52C11 text on black | 3.33:1 | AA large text | Lc -21.9 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F7CEC5
oklch(88.4% 0.048 32.5)
-
Step 300
300
#F3AD9D
oklch(81% 0.086 33.3)
-
Step 400
400
#E97E68
oklch(70.8% 0.137 32.8)
-
Step 500
500
#DF573D
oklch(63.1% 0.175 32.8)
-
Step 600
600
#CB3518
oklch(55.7% 0.191 32.7)
-
Step 700
700 (this color)
#B52C11
oklch(50.9% 0.177 32.7)
-
Step 800
800
#8E220D
oklch(42.8% 0.147 32.8)
-
Step 900
900
#722314
oklch(37.7% 0.114 32.8)
-
Step 950
950
#43160D
oklch(27% 0.072 33.1)
#B52C11 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) | #574D0A | 0.188 |
| Deuteranopia (no green cones) | #796B03 | 0.169 |
| Tritanopia (no blue cones) | #C80028 | 0.050 |
| Achromatopsia (no color) | #606060 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B52C11
#B52C11
oklch(50.9% 0.177 32.7)
- #007384
#007384
oklch(51% 0.089 212.5)
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 #B52C11, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.012
- Firebrick #B22222 ΔE 0.022
- Rufous #AE2012 ΔE 0.024
- Rust Red #AA2704 ΔE 0.026
- Sinopia #BB3E03 ΔE 0.035
- Scarlet #BE0119 ΔE 0.036
- Brown #A52A2A ΔE 0.040
- Brick #A03623 ΔE 0.041
Use #B52C11 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.