#E43F43
Closest named color: Imperial Red (#E63946). oklch(61.4% 0.202 24.2), rgb(228, 63, 67).
Aa
Black text reads best on this color (5.09:1).
About this color
#E43F43 is a medium-dark, vivid red. In OKLCH its lightness is 61%, its chroma 0.202 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.010 away. Black text reads best on it, at 5.09:1.
| Hue family | Reds |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.202) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #E43F43 |
| RGB | rgb(228, 63, 67) |
| HSL | hsl(359, 75%, 57%) |
| OKLCH | oklch(61.4% 0.202 24.2) |
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 #E43F43 | 4.12:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #E43F43 | 5.09:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #E43F43 text on white | 4.12:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #E43F43 text on black | 5.09:1 | AA | Lc -34.7 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FDE3E1
oklch(93.6% 0.029 23)
-
Step 200
200
#FCCCC8
oklch(88.6% 0.055 23.8)
-
Step 300
300
#FAA8A1
oklch(81% 0.098 24.8)
-
Step 400
400
#F3746F
oklch(70.7% 0.157 24.2)
-
Step 500
500 (this color)
#E43F43
oklch(61.4% 0.202 24.2)
-
Step 600
600
#D6102A
oklch(55.6% 0.219 24.2)
-
Step 700
700
#B7001F
oklch(49.1% 0.199 24.3)
-
Step 800
800
#96071A
oklch(42.7% 0.169 24.2)
-
Step 900
900
#78171B
oklch(37.6% 0.131 24.4)
-
Step 950
950
#471011
oklch(27% 0.084 23.8)
#E43F43 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) | #6F6641 | 0.218 |
| Deuteranopia (no green cones) | #988A3D | 0.201 |
| Tritanopia (no blue cones) | #FA0042 | 0.052 |
| Achromatopsia (no color) | #7D7D7D | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E43F43
#E43F43
oklch(61.4% 0.202 24.2)
- #0096A1
#0096A1
oklch(61.4% 0.105 204)
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 #E43F43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.010
- Red Pantone #EF233C ΔE 0.030
- Faded Red #D3494E ΔE 0.033
- Pale Red #D9544D ΔE 0.034
- Pastel Red #DB5856 ΔE 0.040
- Tomato Red #EC2D01 ΔE 0.041
- Dark Coral #CF524E ΔE 0.043
- Vermillion #F4320C ΔE 0.044
Use #E43F43 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.