#C42E2B
Closest named color: Dull Red (#BB3F3F). oklch(54% 0.187 27), rgb(196, 46, 43).
Aa
White text reads best on this color (5.56:1).
About this color
#C42E2B is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.187 and its hue 27°. 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 | #C42E2B |
| RGB | rgb(196, 46, 43) |
| HSL | hsl(1, 64%, 47%) |
| OKLCH | oklch(54% 0.187 27) |
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 #C42E2B | 5.56:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #C42E2B | 3.77:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #C42E2B text on white | 5.56:1 | AA | Lc 76.3 | Fine for body text |
| #C42E2B 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F2ACA3
oklch(80.8% 0.084 27.3)
-
Step 400
400
#E87D72
oklch(70.7% 0.134 27.1)
-
Step 500
500
#DE564D
oklch(63% 0.172 26.9)
-
Step 600
600 (this color)
#C42E2B
oklch(54% 0.187 27)
-
Step 700
700
#AE2423
oklch(49.1% 0.174 26.8)
-
Step 800
800
#8D211E
oklch(42.6% 0.144 27)
-
Step 900
900
#72221E
oklch(37.7% 0.113 26.9)
-
Step 950
950
#431612
oklch(27.1% 0.071 27.8)
#C42E2B 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) | #5C5329 | 0.202 |
| Deuteranopia (no green cones) | #817424 | 0.185 |
| Tritanopia (no blue cones) | #D8002F | 0.044 |
| Achromatopsia (no color) | #686868 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C42E2B
#C42E2B
oklch(54% 0.187 27)
- #007D8A
#007D8A
oklch(53.9% 0.093 207.5)
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 #C42E2B, 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 0.038
- Scarlet #BE0119 ΔE 0.039
- Lipstick Red #C0022F ΔE 0.040
- Sinopia #BB3E03 ΔE 0.041
- Firebrick #B22222 ΔE 0.044
- Dusty Red #B9484E ΔE 0.048
- Rusty Red #AF2F0D ΔE 0.049
Use #C42E2B 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.