#C63D28
Closest named color: Dull Red (#BB3F3F). oklch(55.8% 0.177 31.6), rgb(198, 61, 40).
Aa
White text reads best on this color (5.12:1).
About this color
#C63D28 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.177 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.031 away. White text reads best on it, at 5.12:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.09:1 |
| White text | 5.12:1 |
Values
| HEX | #C63D28 |
| RGB | rgb(198, 61, 40) |
| HSL | hsl(8, 66%, 47%) |
| OKLCH | oklch(55.8% 0.177 31.6) |
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 #C63D28 | 5.12:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #C63D28 | 4.09:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #C63D28 text on white | 5.12:1 | AA | Lc 74.2 | Content text, not long reading |
| #C63D28 text on black | 4.09:1 | AA large text | Lc -27.5 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#F0AEA1
oklch(80.9% 0.08 31.4)
-
Step 400
400
#E5806E
oklch(70.7% 0.128 31.2)
-
Step 500
500
#DA5C47
oklch(63.1% 0.163 31.5)
-
Step 600
600 (this color)
#C63D28
oklch(55.8% 0.177 31.6)
-
Step 700
700
#AA2D1A
oklch(49.1% 0.165 31.6)
-
Step 800
800
#8A2718
oklch(42.6% 0.137 31.5)
-
Step 900
900
#6F261A
oklch(37.7% 0.106 31.7)
-
Step 950
950
#411710
oklch(26.8% 0.067 31.4)
#C63D28 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) | #655B24 | 0.186 |
| Deuteranopia (no green cones) | #877922 | 0.170 |
| Tritanopia (no blue cones) | #DA0839 | 0.062 |
| Achromatopsia (no color) | #6E6E6E | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C63D28
#C63D28
oklch(55.8% 0.177 31.6)
- #008294
#008294
oklch(55.7% 0.097 211.6)
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 #C63D28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.031
- Sinopia #BB3E03 ΔE 0.031
- Brick Orange #C14A09 ΔE 0.034
- Burnt Orange #C04E01 ΔE 0.043
- Dusty Red #B9484E ΔE 0.045
- Faded Red #D3494E ΔE 0.050
- Dark Coral #CF524E ΔE 0.052
- Rust Orange #C45508 ΔE 0.053
Use #C63D28 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.