#B52C03
Closest named color: Rusty Red (#AF2F0D). oklch(50.9% 0.179 34.5), rgb(181, 44, 3).
Aa
White text reads best on this color (6.31:1).
About this color
#B52C03 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.179 and its hue 35°. 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 6.31:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #B52C03 |
| RGB | rgb(181, 44, 3) |
| HSL | hsl(14, 97%, 36%) |
| OKLCH | oklch(50.9% 0.179 34.5) |
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 #B52C03 | 6.31:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #B52C03 | 3.32:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #B52C03 text on white | 6.31:1 | AA | Lc 79.9 | Fine for body text |
| #B52C03 text on black | 3.32:1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F7CFC4
oklch(88.6% 0.048 35.9)
-
Step 300
300
#F3AD9B
oklch(80.9% 0.087 35)
-
Step 400
400
#E97E64
oklch(70.7% 0.138 34.7)
-
Step 500
500
#DF5737
oklch(63% 0.177 34.6)
-
Step 600
600
#CB350A
oklch(55.6% 0.192 34.5)
-
Step 700
700 (this color)
#B52C03
oklch(50.9% 0.179 34.5)
-
Step 800
800
#8E2204
oklch(42.7% 0.148 34.6)
-
Step 900
900
#722310
oklch(37.7% 0.115 34.6)
-
Step 950
950
#43160B
oklch(27% 0.073 35)
#B52C03 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) | #584C00 | 0.186 |
| Deuteranopia (no green cones) | #796B00 | 0.168 |
| Tritanopia (no blue cones) | #C80027 | 0.053 |
| Achromatopsia (no color) | #606060 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B52C03
#B52C03
oklch(50.9% 0.179 34.5)
- #007285
#007285
oklch(50.8% 0.09 214.5)
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 #B52C03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.012
- Rust Red #AA2704 ΔE 0.026
- Rufous #AE2012 ΔE 0.026
- Firebrick #B22222 ΔE 0.027
- Sinopia #BB3E03 ΔE 0.034
- Scarlet #BE0119 ΔE 0.039
- Russet #A13905 ΔE 0.041
- Brick #A03623 ΔE 0.043
Use #B52C03 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.