#C63F39
Closest named color: Dull Red (#BB3F3F). oklch(56.2% 0.172 26.8), rgb(198, 63, 57).
Aa
White text reads best on this color (5.03:1).
About this color
#C63F39 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.172 and its hue 27°. 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 5.03:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #C63F39 |
| RGB | rgb(198, 63, 57) |
| HSL | hsl(3, 55%, 50%) |
| OKLCH | oklch(56.2% 0.172 26.8) |
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 #C63F39 | 5.03:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #C63F39 | 4.17:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #C63F39 text on white | 5.03:1 | AA | Lc 73.7 | Content text, not long reading |
| #C63F39 text on black | 4.17:1 | AA large text | Lc -28.0 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F5CFCA
oklch(88.5% 0.044 26.8)
-
Step 300
300
#EFAEA6
oklch(81% 0.078 26.8)
-
Step 400
400
#E48076
oklch(70.7% 0.125 26.7)
-
Step 500
500
#D95C53
oklch(63.2% 0.159 26.7)
-
Step 600
600 (this color)
#C63F39
oklch(56.2% 0.172 26.8)
-
Step 700
700
#A92E2A
oklch(49.2% 0.16 26.8)
-
Step 800
800
#892824
oklch(42.7% 0.132 26.7)
-
Step 900
900
#6E2622
oklch(37.6% 0.103 26.4)
-
Step 950
950
#411714
oklch(26.9% 0.066 26.5)
#C63F39 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) | #655C37 | 0.184 |
| Deuteranopia (no green cones) | #877A35 | 0.169 |
| Tritanopia (no blue cones) | #DA163F | 0.054 |
| Achromatopsia (no color) | #6F6F6F | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C63F39
#C63F39
oklch(56.2% 0.172 26.8)
- #008491
#008491
oklch(56.1% 0.096 206.9)
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 #C63F39, 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 0.033
- Faded Red #D3494E ΔE 0.039
- Dark Coral #CF524E ΔE 0.043
- Sinopia #BB3E03 ΔE 0.044
- Brick Orange #C14A09 ΔE 0.046
- Dark Rose #B5485D ΔE 0.053
- Cherry #CF0234 ΔE 0.053
Use #C63F39 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.