#E23731
Closest named color: Imperial Red (#E63946). oklch(60.1% 0.208 27.6), rgb(226, 55, 49).
Aa
Black text reads best on this color (4.82:1).
About this color
#E23731 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.208 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.023 away. Black text reads best on it, at 4.82:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.208) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #E23731 |
| RGB | rgb(226, 55, 49) |
| HSL | hsl(2, 75%, 54%) |
| OKLCH | oklch(60.1% 0.208 27.6) |
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 #E23731 | 4.35:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #E23731 | 4.82:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #E23731 text on white | 4.35:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #E23731 text on black | 4.82:1 | AA | Lc -33.1 | 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 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
#FDCCC5
oklch(88.6% 0.057 27.7)
-
Step 300
300
#FCA79C
oklch(80.9% 0.103 27.6)
-
Step 400
400
#F57366
oklch(70.7% 0.162 27.7)
-
Step 500
500 (this color)
#E23731
oklch(60.1% 0.208 27.6)
-
Step 600
600
#D80213
oklch(55.5% 0.226 27.6)
-
Step 700
700
#B7000E
oklch(49% 0.2 27.6)
-
Step 800
800
#980009
oklch(42.7% 0.174 27.7)
-
Step 900
900
#7A1512
oklch(37.8% 0.136 27.9)
-
Step 950
950
#480F0C
oklch(27% 0.087 27.6)
#E23731 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) | #6C612E | 0.224 |
| Deuteranopia (no green cones) | #968629 | 0.204 |
| Tritanopia (no blue cones) | #F90038 | 0.051 |
| Achromatopsia (no color) | #797979 | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E23731
#E23731
oklch(60.1% 0.208 27.6)
- #0091A0
#0091A0
oklch(60% 0.103 207.6)
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 #E23731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.023
- Tomato Red #EC2D01 ΔE 0.028
- Red Pantone #EF233C ΔE 0.032
- Vermillion #F4320C ΔE 0.039
- Faded Red #D3494E ΔE 0.039
- Crimson #DC143C ΔE 0.043
- Pale Red #D9544D ΔE 0.044
- Cherry Red #F7022A ΔE 0.044
Use #E23731 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.