#C73801
Closest named color: Sinopia (#BB3E03). oklch(55.2% 0.187 36.4), rgb(199, 56, 1).
Aa
White text reads best on this color (5.25:1).
About this color
#C73801 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.187 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.024 away. White text reads best on it, at 5.25:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #C73801 |
| RGB | rgb(199, 56, 1) |
| HSL | hsl(17, 99%, 39%) |
| OKLCH | oklch(55.2% 0.187 36.4) |
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 #C73801 | 5.25:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #C73801 | 3.99:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #C73801 text on white | 5.25:1 | AA | Lc 74.7 | Content text, not long reading |
| #C73801 text on black | 3.99:1 | AA large text | Lc -27.0 | 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
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F1AE9B
oklch(80.9% 0.084 36.5)
-
Step 400
400
#E78063
oklch(70.7% 0.134 36.6)
-
Step 500
500
#DD5A35
oklch(63.1% 0.172 36.4)
-
Step 600
600 (this color)
#C73801
oklch(55.2% 0.187 36.4)
-
Step 700
700
#AA2E00
oklch(49% 0.167 36.3)
-
Step 800
800
#8C2501
oklch(42.6% 0.144 36.4)
-
Step 900
900
#71250F
oklch(37.7% 0.112 36.3)
-
Step 950
950
#42170B
oklch(26.9% 0.07 36.4)
#C73801 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) | #645800 | 0.193 |
| Deuteranopia (no green cones) | #877800 | 0.173 |
| Tritanopia (no blue cones) | #DC0031 | 0.067 |
| Achromatopsia (no color) | #6C6C6C | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73801
#C73801
oklch(55.2% 0.187 36.4)
- #008097
#008097
oklch(55.3% 0.098 216.2)
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 #C73801, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.024
- Brick Orange #C14A09 ΔE 0.030
- Burnt Orange #C04E01 ΔE 0.038
- Dull Red #BB3F3F ΔE 0.046
- Rust Orange #C45508 ΔE 0.051
- Burnt Siena #B75203 ΔE 0.051
- Rusty Red #AF2F0D ΔE 0.054
- Deep Orange #DC4D01 ΔE 0.060
Use #C73801 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.