#C13037
Closest named color: Dull Red (#BB3F3F). oklch(53.8% 0.181 23.4), rgb(193, 48, 55).
Aa
White text reads best on this color (5.60:1).
About this color
#C13037 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.181 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.60:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #C13037 |
| RGB | rgb(193, 48, 55) |
| HSL | hsl(357, 60%, 47%) |
| OKLCH | oklch(53.8% 0.181 23.4) |
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 #C13037 | 5.60:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #C13037 | 3.74:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #C13037 text on white | 5.60:1 | AA | Lc 76.6 | Fine for body text |
| #C13037 text on black | 3.74:1 | AA large text | Lc -25.1 | 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
#F6CECB
oklch(88.5% 0.046 23.1)
-
Step 300
300
#F1ACA8
oklch(80.9% 0.082 22.8)
-
Step 400
400
#E77E79
oklch(70.8% 0.13 23.8)
-
Step 500
500
#DC5857
oklch(63.2% 0.166 23.5)
-
Step 600
600 (this color)
#C13037
oklch(53.8% 0.181 23.4)
-
Step 700
700
#AC272E
oklch(49.1% 0.169 23.6)
-
Step 800
800
#8C2327
oklch(42.8% 0.14 23.5)
-
Step 900
900
#702324
oklch(37.6% 0.109 23.3)
-
Step 950
950
#421616
oklch(27% 0.069 22.8)
#C13037 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) | #5B5436 | 0.197 |
| Deuteranopia (no green cones) | #7F7332 | 0.181 |
| Tritanopia (no blue cones) | #D40034 | 0.043 |
| Achromatopsia (no color) | #686868 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C13037
#C13037
oklch(53.8% 0.181 23.4)
- #007D86
#007D86
oklch(53.7% 0.092 203.6)
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 #C13037, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Lipstick Red #C0022F ΔE 0.037
- Cherry #CF0234 ΔE 0.037
- Dusty Red #B9484E ΔE 0.040
- Scarlet #BE0119 ΔE 0.042
- Firebrick #B22222 ΔE 0.043
- Rose Red #BE013C ΔE 0.044
- Ruby #CA0147 ΔE 0.047
Use #C13037 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.