#E43633
Closest named color: Imperial Red (#E63946). oklch(60.4% 0.211 27), rgb(228, 54, 51).
Aa
Black text reads best on this color (4.87:1).
About this color
#E43633 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.211 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.019 away. Black text reads best on it, at 4.87:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.211) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #E43633 |
| RGB | rgb(228, 54, 51) |
| HSL | hsl(1, 77%, 55%) |
| OKLCH | oklch(60.4% 0.211 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 #E43633 | 4.30:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #E43633 | 4.87:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #E43633 text on white | 4.30:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #E43633 text on black | 4.87:1 | AA | Lc -33.4 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FDCBC5
oklch(88.4% 0.058 26.2)
-
Step 300
300
#FCA79D
oklch(80.9% 0.102 26.9)
-
Step 400
400
#F67266
oklch(70.7% 0.164 27.3)
-
Step 500
500 (this color)
#E43633
oklch(60.4% 0.211 27)
-
Step 600
600
#D90017
oklch(55.7% 0.227 27)
-
Step 700
700
#B70012
oklch(49% 0.2 27)
-
Step 800
800
#98000D
oklch(42.8% 0.174 27)
-
Step 900
900
#7A1313
oklch(37.6% 0.137 27)
-
Step 950
950
#480F0D
oklch(27% 0.087 26.8)
#E43633 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) | #6C6230 | 0.228 |
| Deuteranopia (no green cones) | #97872B | 0.207 |
| Tritanopia (no blue cones) | #FB0038 | 0.049 |
| Achromatopsia (no color) | #7A7A7A | 0.212 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E43633
#E43633
oklch(60.4% 0.211 27)
- #0092A1
#0092A1
oklch(60.3% 0.104 207.5)
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 #E43633, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.019
- Tomato Red #EC2D01 ΔE 0.027
- Red Pantone #EF233C ΔE 0.028
- Vermillion #F4320C ΔE 0.037
- Cherry Red #F7022A ΔE 0.041
- Faded Red #D3494E ΔE 0.041
- Crimson #DC143C ΔE 0.043
- Pale Red #D9544D ΔE 0.045
Use #E43633 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.