#C52C03
Closest named color: Sinopia (#BB3E03). oklch(53.8% 0.194 33.6), rgb(197, 44, 3).
Aa
White text reads best on this color (5.62:1).
About this color
#C52C03 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.194 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.029 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.194) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #C52C03 |
| RGB | rgb(197, 44, 3) |
| HSL | hsl(13, 97%, 39%) |
| OKLCH | oklch(53.8% 0.194 33.6) |
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 #C52C03 | 5.62:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #C52C03 | 3.73:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #C52C03 text on white | 5.62:1 | AA | Lc 76.5 | Fine for body text |
| #C52C03 text on black | 3.73:1 | AA large text | Lc -25.3 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
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
#F3AC9C
oklch(80.8% 0.087 33.1)
-
Step 400
400
#EA7D65
oklch(70.7% 0.14 33.6)
-
Step 500
500
#E05639
oklch(63.1% 0.178 33.6)
-
Step 600
600 (this color)
#C52C03
oklch(53.8% 0.194 33.6)
-
Step 700
700
#AF2500
oklch(49.1% 0.178 33.7)
-
Step 800
800
#8F2107
oklch(42.8% 0.149 33.6)
-
Step 900
900
#732211
oklch(37.7% 0.117 33.5)
-
Step 950
950
#43160C
oklch(27% 0.072 34.1)
#C52C03 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) | #5E5200 | 0.204 |
| Deuteranopia (no green cones) | #837400 | 0.183 |
| Tritanopia (no blue cones) | #DA0027 | 0.052 |
| Achromatopsia (no color) | #676767 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C52C03
#C52C03
oklch(53.8% 0.194 33.6)
- #007C8F
#007C8F
oklch(53.9% 0.094 213.2)
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 #C52C03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.029
- Scarlet #BE0119 ΔE 0.043
- Rusty Red #AF2F0D ΔE 0.044
- Dull Red #BB3F3F ΔE 0.045
- Brick Orange #C14A09 ΔE 0.046
- Firebrick #B22222 ΔE 0.048
- Cherry #CF0234 ΔE 0.052
- Lipstick Red #C0022F ΔE 0.053
Use #C52C03 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.