#E33B51
Closest named color: Imperial Red (#E63946). oklch(61.1% 0.203 18.7), rgb(227, 59, 81).
Aa
Black text reads best on this color (5.01:1).
About this color
#E33B51 is a medium-dark, vivid red. In OKLCH its lightness is 61%, its chroma 0.203 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.014 away. Black text reads best on it, at 5.01:1.
| Hue family | Reds |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.203) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #E33B51 |
| RGB | rgb(227, 59, 81) |
| HSL | hsl(352, 75%, 56%) |
| OKLCH | oklch(61.1% 0.203 18.7) |
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 #E33B51 | 4.19:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #E33B51 | 5.01:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #E33B51 text on white | 4.19:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #E33B51 text on black | 5.01:1 | AA | Lc -34.2 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FDE3E2
oklch(93.7% 0.029 20.3)
-
Step 200
200
#FCCBCB
oklch(88.5% 0.056 18.3)
-
Step 300
300
#FAA7A7
oklch(80.9% 0.099 19.4)
-
Step 400
400
#F37279
oklch(70.7% 0.159 18.7)
-
Step 500
500 (this color)
#E33B51
oklch(61.1% 0.203 18.7)
-
Step 600
600
#D6063C
oklch(55.6% 0.221 18.8)
-
Step 700
700
#B60031
oklch(49.2% 0.197 18.8)
-
Step 800
800
#960227
oklch(42.7% 0.17 18.9)
-
Step 900
900
#781524
oklch(37.6% 0.132 18.8)
-
Step 950
950
#470F16
oklch(27% 0.084 18)
#E33B51 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) | #6B6551 | 0.223 |
| Deuteranopia (no green cones) | #95894C | 0.206 |
| Tritanopia (no blue cones) | #F90045 | 0.048 |
| Achromatopsia (no color) | #7C7C7C | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E33B51
#E33B51
oklch(61.1% 0.203 18.7)
- #00969B
#00969B
oklch(61.1% 0.104 199)
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 #E33B51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.014
- Red Pantone #EF233C ΔE 0.032
- Faded Red #D3494E ΔE 0.034
- Pale Red #D9544D ΔE 0.043
- Pink Red #F5054F ΔE 0.044
- Red Pink #FA2A55 ΔE 0.044
- Crimson #DC143C ΔE 0.044
- Pastel Red #DB5856 ΔE 0.046
Use #E33B51 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.