#C73F37
Closest named color: Dull Red (#BB3F3F). oklch(56.3% 0.174 27.5), rgb(199, 63, 55).
Aa
White text reads best on this color (5.00:1).
About this color
#C73F37 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.174 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.025 away. White text reads best on it, at 5.00:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #C73F37 |
| RGB | rgb(199, 63, 55) |
| HSL | hsl(3, 57%, 50%) |
| OKLCH | oklch(56.3% 0.174 27.5) |
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 #C73F37 | 5.00:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #C73F37 | 4.19:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #C73F37 text on white | 5.00:1 | AA | Lc 73.5 | Content text, not long reading |
| #C73F37 text on black | 4.19:1 | AA large text | Lc -28.2 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F5CFCA
oklch(88.5% 0.044 26.8)
-
Step 300
300
#EFAEA5
oklch(80.9% 0.078 27.8)
-
Step 400
400
#E48075
oklch(70.7% 0.125 27.3)
-
Step 500
500
#D95C51
oklch(63.1% 0.159 27.6)
-
Step 600
600 (this color)
#C73F37
oklch(56.3% 0.174 27.5)
-
Step 700
700
#A92D27
oklch(49% 0.162 27.6)
-
Step 800
800
#892722
oklch(42.6% 0.134 27.3)
-
Step 900
900
#6F2621
oklch(37.8% 0.105 27.1)
-
Step 950
950
#411714
oklch(26.9% 0.066 26.5)
#C73F37 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) | #655D35 | 0.186 |
| Deuteranopia (no green cones) | #877A32 | 0.170 |
| Tritanopia (no blue cones) | #DB143E | 0.055 |
| Achromatopsia (no color) | #6F6F6F | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C73F37
#C73F37
oklch(56.3% 0.174 27.5)
- #008592
#008592
oklch(56.4% 0.097 206.8)
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 #C73F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.025
- Dusty Red #B9484E ΔE 0.035
- Faded Red #D3494E ΔE 0.038
- Dark Coral #CF524E ΔE 0.042
- Sinopia #BB3E03 ΔE 0.043
- Brick Orange #C14A09 ΔE 0.044
- Burnt Orange #C04E01 ΔE 0.052
- Cherry #CF0234 ΔE 0.054
Use #C73F37 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.