#E4243D
Closest named color: Red Pantone (#EF233C). oklch(59.3% 0.221 21.8), rgb(228, 36, 61).
Aa
Black text reads best on this color (4.61:1).
About this color
#E4243D is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.221 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Red Pantone (#EF233C), ΔE 0.022 away. Black text reads best on it, at 4.61:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.221) |
| Temperature | warm |
| Nearest name | Red Pantone (#EF233C) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #E4243D |
| RGB | rgb(228, 36, 61) |
| HSL | hsl(352, 78%, 52%) |
| OKLCH | oklch(59.3% 0.221 21.8) |
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 #E4243D | 4.54:1 | AA | Lc -75.1 | Fine for body text |
| Black text on #E4243D | 4.61:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #E4243D text on white | 4.54:1 | AA | Lc 69.6 | Content text, not long reading |
| #E4243D text on black | 4.61:1 | AA | Lc -32.1 | 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 600.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FDE3E1
oklch(93.6% 0.029 23)
-
Step 200
200
#FCCBC9
oklch(88.4% 0.056 21)
-
Step 300
300
#FBA7A4
oklch(81% 0.1 21.7)
-
Step 400
400
#F47373
oklch(70.8% 0.159 22)
-
Step 500
500
#EB434E
oklch(63.1% 0.204 21.9)
-
Step 600
600 (this color)
#E4243D
oklch(59.3% 0.221 21.8)
-
Step 700
700
#B60028
oklch(49% 0.197 21.7)
-
Step 800
800
#960320
oklch(42.6% 0.17 21.7)
-
Step 900
900
#79151F
oklch(37.7% 0.133 21.8)
-
Step 950
950
#471013
oklch(27% 0.083 21.8)
#E4243D 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) | #645C3C | 0.244 |
| Deuteranopia (no green cones) | #928436 | 0.223 |
| Tritanopia (no blue cones) | #FB0030 | 0.044 |
| Achromatopsia (no color) | #767676 | 0.223 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E4243D
#E4243D
oklch(59.3% 0.221 21.8)
- #008F98
#008F98
oklch(59.2% 0.101 202.6)
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 #E4243D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Pantone #EF233C ΔE 0.022
- Crimson #DC143C ΔE 0.023
- Imperial Red #E63946 ΔE 0.023
- Cherry Red #F7022A ΔE 0.038
- Pink Red #F5054F ΔE 0.041
- Lipstick #D5174E ΔE 0.044
- Tomato Red #EC2D01 ΔE 0.045
- Strawberry #FB2943 ΔE 0.048
Use #E4243D 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.