#C73D2B
Closest named color: Dull Red (#BB3F3F). oklch(56% 0.178 30.7), rgb(199, 61, 43).
Aa
White text reads best on this color (5.08:1).
About this color
#C73D2B is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.178 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.030 away. White text reads best on it, at 5.08:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #C73D2B |
| RGB | rgb(199, 61, 43) |
| HSL | hsl(7, 64%, 47%) |
| OKLCH | oklch(56% 0.178 30.7) |
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 #C73D2B | 5.08:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #C73D2B | 4.13:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #C73D2B text on white | 5.08:1 | AA | Lc 73.9 | Content text, not long reading |
| #C73D2B text on black | 4.13:1 | AA large text | Lc -27.8 | 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
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F5CFC8
oklch(88.5% 0.044 30.2)
-
Step 300
300
#F0AEA2
oklch(81% 0.08 30.5)
-
Step 400
400
#E5806F
oklch(70.7% 0.128 30.6)
-
Step 500
500
#DA5B48
oklch(63% 0.164 30.7)
-
Step 600
600 (this color)
#C73D2B
oklch(56% 0.178 30.7)
-
Step 700
700
#AA2C1D
oklch(49% 0.165 30.5)
-
Step 800
800
#8A271A
oklch(42.7% 0.136 30.8)
-
Step 900
900
#6F261B
oklch(37.7% 0.106 31.1)
-
Step 950
950
#421711
oklch(27% 0.068 30.2)
#C73D2B 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) | #655B28 | 0.188 |
| Deuteranopia (no green cones) | #887925 | 0.170 |
| Tritanopia (no blue cones) | #DB073A | 0.061 |
| Achromatopsia (no color) | #6E6E6E | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73D2B
#C73D2B
oklch(56% 0.178 30.7)
- #008394
#008394
oklch(55.9% 0.097 210.6)
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 #C73D2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.030
- Sinopia #BB3E03 ΔE 0.034
- Brick Orange #C14A09 ΔE 0.036
- Dusty Red #B9484E ΔE 0.044
- Burnt Orange #C04E01 ΔE 0.045
- Faded Red #D3494E ΔE 0.047
- Dark Coral #CF524E ΔE 0.049
- Rust Orange #C45508 ΔE 0.054
Use #C73D2B 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.