#C63520
Closest named color: Sinopia (#BB3E03). oklch(54.9% 0.185 31.4), rgb(198, 53, 32).
Aa
White text reads best on this color (5.34:1).
About this color
#C63520 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.185 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.030 away. White text reads best on it, at 5.34:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.93:1 |
| White text | 5.34:1 |
Values
| HEX | #C63520 |
| RGB | rgb(198, 53, 32) |
| HSL | hsl(8, 72%, 45%) |
| OKLCH | oklch(54.9% 0.185 31.4) |
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 #C63520 | 5.34:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #C63520 | 3.93:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #C63520 text on white | 5.34:1 | AA | Lc 75.2 | Fine for body text |
| #C63520 text on black | 3.93:1 | AA large text | Lc -26.5 | 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
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F6CFC7
oklch(88.6% 0.046 31.6)
-
Step 300
300
#F2ADA0
oklch(80.9% 0.084 30.9)
-
Step 400
400
#E77F6C
oklch(70.7% 0.132 31.5)
-
Step 500
500
#DD5943
oklch(63.1% 0.17 31.7)
-
Step 600
600 (this color)
#C63520
oklch(54.9% 0.185 31.4)
-
Step 700
700
#AD2815
oklch(49.1% 0.172 31.3)
-
Step 800
800
#8C2415
oklch(42.6% 0.142 31.3)
-
Step 900
900
#712418
oklch(37.7% 0.111 31.5)
-
Step 950
950
#42160F
oklch(26.8% 0.07 31.2)
#C63520 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) | #61561C | 0.196 |
| Deuteranopia (no green cones) | #857617 | 0.177 |
| Tritanopia (no blue cones) | #DA0032 | 0.055 |
| Achromatopsia (no color) | #6B6B6B | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C63520
#C63520
oklch(54.9% 0.185 31.4)
- #008091
#008091
oklch(55% 0.095 210.9)
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 #C63520, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.030
- Dull Red #BB3F3F ΔE 0.034
- Brick Orange #C14A09 ΔE 0.041
- Burnt Orange #C04E01 ΔE 0.050
- Cherry #CF0234 ΔE 0.050
- Dusty Red #B9484E ΔE 0.051
- Rusty Red #AF2F0D ΔE 0.051
- Scarlet #BE0119 ΔE 0.051
Use #C63520 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.