#C63538
Closest named color: Dull Red (#BB3F3F). oklch(55.1% 0.182 24.5), rgb(198, 53, 56).
Aa
White text reads best on this color (5.29:1).
About this color
#C63538 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.182 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 5.29:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.182) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #C63538 |
| RGB | rgb(198, 53, 56) |
| HSL | hsl(359, 58%, 49%) |
| OKLCH | oklch(55.1% 0.182 24.5) |
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 #C63538 | 5.29:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #C63538 | 3.96:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #C63538 text on white | 5.29:1 | AA | Lc 75.0 | Fine for body text |
| #C63538 text on black | 3.96:1 | AA large text | Lc -26.7 | 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
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F6CECA
oklch(88.4% 0.046 24.8)
-
Step 300
300
#F1ACA7
oklch(80.8% 0.082 23.7)
-
Step 400
400
#E77E77
oklch(70.8% 0.131 24.9)
-
Step 500
500
#DC5854
oklch(63.1% 0.167 24.8)
-
Step 600
600 (this color)
#C63538
oklch(55.1% 0.182 24.5)
-
Step 700
700
#AC272C
oklch(49.1% 0.169 24.3)
-
Step 800
800
#8C2325
oklch(42.7% 0.14 24.5)
-
Step 900
900
#702323
oklch(37.6% 0.109 24)
-
Step 950
950
#421615
oklch(27% 0.069 24.1)
#C63538 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) | #5F5837 | 0.197 |
| Deuteranopia (no green cones) | #847733 | 0.180 |
| Tritanopia (no blue cones) | #DA0038 | 0.048 |
| Achromatopsia (no color) | #6B6B6B | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C63538
#C63538
oklch(55.1% 0.182 24.5)
- #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 #C63538, 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 0.038
- Cherry #CF0234 ΔE 0.039
- Crimson #DC143C ΔE 0.047
- Faded Red #D3494E ΔE 0.048
- Lipstick Red #C0022F ΔE 0.048
- Sinopia #BB3E03 ΔE 0.048
- Lipstick #D5174E ΔE 0.051
Use #C63538 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.