#C73B3D
Closest named color: Dull Red (#BB3F3F). oklch(56% 0.177 24.2), rgb(199, 59, 61).
Aa
White text reads best on this color (5.09:1).
About this color
#C73B3D is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.177 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.023 away. White text reads best on it, at 5.09:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #C73B3D |
| RGB | rgb(199, 59, 61) |
| HSL | hsl(359, 56%, 51%) |
| OKLCH | oklch(56% 0.177 24.2) |
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 #C73B3D | 5.09:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #C73B3D | 4.12:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #C73B3D text on white | 5.09:1 | AA | Lc 74.0 | Content text, not long reading |
| #C73B3D text on black | 4.12:1 | AA large text | Lc -27.7 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F5CECB
oklch(88.4% 0.044 23.2)
-
Step 300
300
#F0ADA8
oklch(80.9% 0.08 23.8)
-
Step 400
400
#E57F79
oklch(70.7% 0.127 24.3)
-
Step 500
500
#DA5A57
oklch(63.1% 0.162 24.2)
-
Step 600
600 (this color)
#C73B3D
oklch(56% 0.177 24.2)
-
Step 700
700
#AA2A2E
oklch(49% 0.164 24.2)
-
Step 800
800
#8A2527
oklch(42.6% 0.136 24.1)
-
Step 900
900
#6F2524
oklch(37.7% 0.105 24.4)
-
Step 950
950
#421715
oklch(27.1% 0.067 25.3)
#C73B3D 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) | #625B3C | 0.192 |
| Deuteranopia (no green cones) | #867939 | 0.174 |
| Tritanopia (no blue cones) | #DB093D | 0.051 |
| Achromatopsia (no color) | #6E6E6E | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73B3D
#C73B3D
oklch(56% 0.177 24.2)
- #00848E
#00848E
oklch(55.9% 0.095 204.2)
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 #C73B3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.023
- Dusty Red #B9484E ΔE 0.033
- Faded Red #D3494E ΔE 0.039
- Dark Coral #CF524E ΔE 0.046
- Cherry #CF0234 ΔE 0.046
- Crimson #DC143C ΔE 0.049
- Dark Rose #B5485D ΔE 0.050
- Sinopia #BB3E03 ΔE 0.051
Use #C73B3D 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.