#C73D00
Closest named color: Brick Orange (#C14A09). oklch(55.7% 0.183 37.8), rgb(199, 61, 0).
Aa
White text reads best on this color (5.12:1).
About this color
#C73D00 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.183 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Orange (#C14A09), ΔE 0.023 away. White text reads best on it, at 5.12:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Brick Orange (#C14A09) |
| Black text | 4.09:1 |
| White text | 5.12:1 |
Values
| HEX | #C73D00 |
| RGB | rgb(199, 61, 0) |
| HSL | hsl(18, 100%, 39%) |
| OKLCH | oklch(55.7% 0.183 37.8) |
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 #C73D00 | 5.12:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #C73D00 | 4.09:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #C73D00 text on white | 5.12:1 | AA | Lc 74.1 | Content text, not long reading |
| #C73D00 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5CFC4
oklch(88.4% 0.046 36.7)
-
Step 300
300
#F0AF9A
oklch(81% 0.082 38.7)
-
Step 400
400
#E68162
oklch(70.7% 0.132 37.8)
-
Step 500
500
#DB5C34
oklch(63% 0.169 37.7)
-
Step 600
600 (this color)
#C73D00
oklch(55.7% 0.183 37.8)
-
Step 700
700
#A83200
oklch(49.1% 0.162 37.8)
-
Step 800
800
#8B2800
oklch(42.8% 0.14 37.9)
-
Step 900
900
#70260E
oklch(37.7% 0.11 37.4)
-
Step 950
950
#42180A
oklch(27.1% 0.069 38.5)
#C73D00 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) | #675A00 | 0.185 |
| Deuteranopia (no green cones) | #897900 | 0.166 |
| Tritanopia (no blue cones) | #DC0034 | 0.074 |
| Achromatopsia (no color) | #6E6E6E | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73D00
#C73D00
oklch(55.7% 0.183 37.8)
- #00819A
#00819A
oklch(55.7% 0.1 217.7)
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 #C73D00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Orange #C14A09 ΔE 0.023
- Sinopia #BB3E03 ΔE 0.024
- Burnt Orange #C04E01 ΔE 0.031
- Rust Orange #C45508 ΔE 0.043
- Burnt Siena #B75203 ΔE 0.045
- Dull Red #BB3F3F ΔE 0.049
- Deep Orange #DC4D01 ΔE 0.054
- Rusty Orange #CD5909 ΔE 0.055
Use #C73D00 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.