#C73C1F
Closest named color: Sinopia (#BB3E03). oklch(55.7% 0.18 33.4), rgb(199, 60, 31).
Aa
White text reads best on this color (5.12:1).
About this color
#C73C1F is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.180 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.028 away. White text reads best on it, at 5.12:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 4.09:1 |
| White text | 5.12:1 |
Values
| HEX | #C73C1F |
| RGB | rgb(199, 60, 31) |
| HSL | hsl(10, 73%, 45%) |
| OKLCH | oklch(55.7% 0.18 33.4) |
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 #C73C1F | 5.12:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #C73C1F | 4.09:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #C73C1F text on white | 5.12:1 | AA | Lc 74.1 | Content text, not long reading |
| #C73C1F text on black | 4.09:1 | AA large text | Lc -27.6 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC6
oklch(88.4% 0.045 33.5)
-
Step 300
300
#F0AE9F
oklch(80.9% 0.081 33.2)
-
Step 400
400
#E6806A
oklch(70.7% 0.131 33.2)
-
Step 500
500
#DB5B41
oklch(63.1% 0.166 33.2)
-
Step 600
600 (this color)
#C73C1F
oklch(55.7% 0.18 33.4)
-
Step 700
700
#AB2C10
oklch(49.1% 0.168 33.4)
-
Step 800
800
#8B2712
oklch(42.8% 0.139 33.4)
-
Step 900
900
#702617
oklch(37.8% 0.108 33.3)
-
Step 950
950
#42170E
oklch(27% 0.069 33.5)
#C73C1F 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) | #665A1A | 0.187 |
| Deuteranopia (no green cones) | #887917 | 0.171 |
| Tritanopia (no blue cones) | #DB0037 | 0.065 |
| Achromatopsia (no color) | #6E6E6E | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73C1F
#C73C1F
oklch(55.7% 0.18 33.4)
- #008296
#008296
oklch(55.7% 0.098 213.4)
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 #C73C1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.028
- Brick Orange #C14A09 ΔE 0.031
- Dull Red #BB3F3F ΔE 0.037
- Burnt Orange #C04E01 ΔE 0.039
- Rust Orange #C45508 ΔE 0.050
- Dusty Red #B9484E ΔE 0.051
- Burnt Siena #B75203 ΔE 0.053
- Faded Red #D3494E ΔE 0.054
Use #C73C1F 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.