#C63B43
Closest named color: Dull Red (#BB3F3F). oklch(55.9% 0.175 21.8), rgb(198, 59, 67).
Aa
White text reads best on this color (5.11:1).
About this color
#C63B43 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.175 and its hue 22°. 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 5.11:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #C63B43 |
| RGB | rgb(198, 59, 67) |
| HSL | hsl(357, 55%, 50%) |
| OKLCH | oklch(55.9% 0.175 21.8) |
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 #C63B43 | 5.11:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #C63B43 | 4.10:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #C63B43 text on white | 5.11:1 | AA | Lc 74.1 | Content text, not long reading |
| #C63B43 text on black | 4.10:1 | AA large text | Lc -27.6 | 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
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CECC
oklch(88.4% 0.044 21.5)
-
Step 300
300
#F0ADAA
oklch(81% 0.079 21.8)
-
Step 400
400
#E47F7D
oklch(70.7% 0.125 21.9)
-
Step 500
500
#DA5A5C
oklch(63.2% 0.161 22)
-
Step 600
600 (this color)
#C63B43
oklch(55.9% 0.175 21.8)
-
Step 700
700
#AA2B34
oklch(49.2% 0.163 22)
-
Step 800
800
#8A262C
oklch(42.8% 0.135 21.8)
-
Step 900
900
#6F2527
oklch(37.7% 0.105 22.1)
-
Step 950
950
#411717
oklch(27% 0.066 22.5)
#C63B43 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) | #615B42 | 0.191 |
| Deuteranopia (no green cones) | #84793F | 0.176 |
| Tritanopia (no blue cones) | #D90F3F | 0.048 |
| Achromatopsia (no color) | #6E6E6E | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C63B43
#C63B43
oklch(55.9% 0.175 21.8)
- #00848C
#00848C
oklch(55.8% 0.095 202.3)
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 #C63B43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Dusty Red #B9484E ΔE 0.030
- Faded Red #D3494E ΔE 0.039
- Dark Rose #B5485D ΔE 0.045
- Cherry #CF0234 ΔE 0.045
- Deep Rose #C74767 ΔE 0.047
- Dark Coral #CF524E ΔE 0.047
- Crimson #DC143C ΔE 0.049
Use #C63B43 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.