#C43F40
Closest named color: Dull Red (#BB3F3F). oklch(55.9% 0.169 24.1), rgb(196, 63, 64).
Aa
White text reads best on this color (5.08:1).
About this color
#C43F40 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.169 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.08:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #C43F40 |
| RGB | rgb(196, 63, 64) |
| HSL | hsl(360, 53%, 51%) |
| OKLCH | oklch(55.9% 0.169 24.1) |
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 #C43F40 | 5.08:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #C43F40 | 4.13:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #C43F40 text on white | 5.08:1 | AA | Lc 74.0 | Content text, not long reading |
| #C43F40 text on black | 4.13:1 | AA large text | Lc -27.7 | 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
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F4CFCC
oklch(88.5% 0.042 23.5)
-
Step 300
300
#EEAEA9
oklch(80.9% 0.076 23.9)
-
Step 400
400
#E3807B
oklch(70.7% 0.123 23.7)
-
Step 500
500
#D75C59
oklch(63% 0.156 24)
-
Step 600
600 (this color)
#C43F40
oklch(55.9% 0.169 24.1)
-
Step 700
700
#A82E31
oklch(49.1% 0.158 24)
-
Step 800
800
#882829
oklch(42.6% 0.131 24)
-
Step 900
900
#6E2726
oklch(37.8% 0.102 24)
-
Step 950
950
#411816
oklch(27.1% 0.064 25.1)
#C43F40 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) | #635C3F | 0.183 |
| Deuteranopia (no green cones) | #85793C | 0.168 |
| Tritanopia (no blue cones) | #D71A41 | 0.050 |
| Achromatopsia (no color) | #6E6E6E | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C43F40
#C43F40
oklch(55.9% 0.169 24.1)
- #00848E
#00848E
oklch(55.9% 0.095 204.2)
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 #C43F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Dusty Red #B9484E ΔE 0.026
- Faded Red #D3494E ΔE 0.039
- Dark Coral #CF524E ΔE 0.044
- Dark Rose #B5485D ΔE 0.045
- Sinopia #BB3E03 ΔE 0.050
- Deep Rose #C74767 ΔE 0.050
- Cherry #CF0234 ΔE 0.052
Use #C43F40 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.