#C43040
Closest named color: Dull Red (#BB3F3F). oklch(54.5% 0.183 20.3), rgb(196, 48, 64).
Aa
White text reads best on this color (5.46:1).
About this color
#C43040 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.183 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.026 away. White text reads best on it, at 5.46:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Values
| HEX | #C43040 |
| RGB | rgb(196, 48, 64) |
| HSL | hsl(354, 61%, 48%) |
| OKLCH | oklch(54.5% 0.183 20.3) |
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 #C43040 | 5.46:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #C43040 | 3.84:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #C43040 text on white | 5.46:1 | AA | Lc 75.9 | Fine for body text |
| #C43040 text on black | 3.84:1 | AA large text | Lc -25.9 | 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
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F1ACAA
oklch(80.9% 0.082 20.9)
-
Step 400
400
#E77C7E
oklch(70.6% 0.132 19.8)
-
Step 500
500
#DD565D
oklch(63.2% 0.169 20.3)
-
Step 600
600 (this color)
#C43040
oklch(54.5% 0.183 20.3)
-
Step 700
700
#AC2535
oklch(49.1% 0.17 20.3)
-
Step 800
800
#8C212C
oklch(42.7% 0.142 20.3)
-
Step 900
900
#712228
oklch(37.7% 0.111 20)
-
Step 950
950
#421518
oklch(26.9% 0.07 19.2)
#C43040 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) | #5B553F | 0.201 |
| Deuteranopia (no green cones) | #80753B | 0.185 |
| Tritanopia (no blue cones) | #D70037 | 0.041 |
| Achromatopsia (no color) | #696969 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C43040
#C43040
oklch(54.5% 0.183 20.3)
- #008085
#008085
oklch(54.5% 0.093 199.6)
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 #C43040, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.026
- Cherry #CF0234 ΔE 0.033
- Dusty Red #B9484E ΔE 0.039
- Ruby #CA0147 ΔE 0.039
- Lipstick Red #C0022F ΔE 0.040
- Lipstick #D5174E ΔE 0.043
- Rose Red #BE013C ΔE 0.043
- Crimson #DC143C ΔE 0.047
Use #C43040 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.