#C53637
Closest named color: Dull Red (#BB3F3F). oklch(55% 0.18 25), rgb(197, 54, 55).
Aa
White text reads best on this color (5.30:1).
About this color
#C53637 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.180 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.021 away. White text reads best on it, at 5.30:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.95:1 |
| White text | 5.30:1 |
Values
| HEX | #C53637 |
| RGB | rgb(197, 54, 55) |
| HSL | hsl(360, 57%, 49%) |
| OKLCH | oklch(55% 0.18 25) |
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 #C53637 | 5.30:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #C53637 | 3.95:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #C53637 text on white | 5.30:1 | AA | Lc 75.1 | Fine for body text |
| #C53637 text on black | 3.95:1 | AA large text | Lc -26.6 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F6CECA
oklch(88.4% 0.046 24.8)
-
Step 300
300
#F1ADA6
oklch(81% 0.081 25.6)
-
Step 400
400
#E67E77
oklch(70.7% 0.13 24.9)
-
Step 500
500
#DC5954
oklch(63.2% 0.166 25.2)
-
Step 600
600 (this color)
#C53637
oklch(55% 0.18 25)
-
Step 700
700
#AB282B
oklch(49% 0.167 24.9)
-
Step 800
800
#8B2425
oklch(42.7% 0.138 24.8)
-
Step 900
900
#702422
oklch(37.7% 0.108 25.3)
-
Step 950
950
#421615
oklch(27% 0.069 24.1)
#C53637 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) | #605836 | 0.194 |
| Deuteranopia (no green cones) | #837732 | 0.179 |
| Tritanopia (no blue cones) | #D90038 | 0.049 |
| Achromatopsia (no color) | #6B6B6B | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C53637
#C53637
oklch(55% 0.18 25)
- #00818C
#00818C
oklch(55.1% 0.094 205.3)
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 #C53637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.021
- Dusty Red #B9484E ΔE 0.037
- Cherry #CF0234 ΔE 0.041
- Sinopia #BB3E03 ΔE 0.046
- Faded Red #D3494E ΔE 0.048
- Lipstick Red #C0022F ΔE 0.049
- Crimson #DC143C ΔE 0.050
- Scarlet #BE0119 ΔE 0.052
Use #C53637 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.