#C42C3B
Closest named color: Dull Red (#BB3F3F). oklch(54.1% 0.187 21.4), rgb(196, 44, 59).
Aa
White text reads best on this color (5.56:1).
About this color
#C42C3B is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.187 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.029 away. White text reads best on it, at 5.56:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.77:1 |
| White text | 5.56:1 |
Values
| HEX | #C42C3B |
| RGB | rgb(196, 44, 59) |
| HSL | hsl(354, 63%, 47%) |
| OKLCH | oklch(54.1% 0.187 21.4) |
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 #C42C3B | 5.56:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #C42C3B | 3.77:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #C42C3B text on white | 5.56:1 | AA | Lc 76.3 | Fine for body text |
| #C42C3B text on black | 3.77:1 | AA large text | Lc -25.4 | 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
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CECC
oklch(88.6% 0.047 21.4)
-
Step 300
300
#F2ABA9
oklch(80.8% 0.084 20.9)
-
Step 400
400
#E87C7B
oklch(70.7% 0.134 21.6)
-
Step 500
500
#DE555A
oklch(63.1% 0.171 21.3)
-
Step 600
600 (this color)
#C42C3B
oklch(54.1% 0.187 21.4)
-
Step 700
700
#AE2231
oklch(49.1% 0.174 21.5)
-
Step 800
800
#8D202A
oklch(42.7% 0.144 21.2)
-
Step 900
900
#712226
oklch(37.7% 0.111 21.4)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#C42C3B 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) | #5A533A | 0.205 |
| Deuteranopia (no green cones) | #807436 | 0.188 |
| Tritanopia (no blue cones) | #D80033 | 0.041 |
| Achromatopsia (no color) | #686868 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C42C3B
#C42C3B
oklch(54.1% 0.187 21.4)
- #007E85
#007E85
oklch(54% 0.092 201.6)
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 #C42C3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.029
- Cherry #CF0234 ΔE 0.030
- Lipstick Red #C0022F ΔE 0.034
- Ruby #CA0147 ΔE 0.038
- Rose Red #BE013C ΔE 0.040
- Scarlet #BE0119 ΔE 0.043
- Dusty Red #B9484E ΔE 0.043
- Lipstick #D5174E ΔE 0.045
Use #C42C3B 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.