#E40B23
Closest named color: Crimson (#DC143C). oklch(58.1% 0.233 25.9), rgb(228, 11, 35).
Aa
White text reads best on this color (4.80:1).
About this color
#E40B23 is a medium-dark, vivid red. In OKLCH its lightness is 58%, its chroma 0.233 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.027 away. White text reads best on it, at 4.80:1.
| Hue family | Reds |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.233) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #E40B23 |
| RGB | rgb(228, 11, 35) |
| HSL | hsl(353, 91%, 47%) |
| OKLCH | oklch(58.1% 0.233 25.9) |
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 #E40B23 | 4.80:1 | AA | Lc -76.2 | Fine for body text |
| Black text on #E40B23 | 4.37:1 | AA large text | Lc 33.4 | Non-text elements, placeholder text |
| #E40B23 text on white | 4.80:1 | AA | Lc 70.7 | Content text, not long reading |
| #E40B23 text on black | 4.37:1 | AA large text | Lc -31.0 | 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
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FEE3DF
oklch(93.7% 0.03 27.8)
-
Step 200
200
#FECBC5
oklch(88.5% 0.059 26.1)
-
Step 300
300
#FDA69D
oklch(80.9% 0.105 26.1)
-
Step 400
400
#F77068
oklch(70.6% 0.167 25.7)
-
Step 500
500
#EF3E3E
oklch(63.1% 0.213 25.8)
-
Step 600
600 (this color)
#E40B23
oklch(58.1% 0.233 25.9)
-
Step 700
700
#B70018
oklch(49.1% 0.199 25.9)
-
Step 800
800
#980012
oklch(42.8% 0.174 25.9)
-
Step 900
900
#7B1115
oklch(37.7% 0.139 25.7)
-
Step 950
950
#490E0D
oklch(27.1% 0.089 26.2)
#E40B23 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) | #605620 | 0.258 |
| Deuteranopia (no green cones) | #918115 | 0.231 |
| Tritanopia (no blue cones) | #FC001B | 0.048 |
| Achromatopsia (no color) | #727272 | 0.234 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E40B23
#E40B23
oklch(58.1% 0.233 25.9)
- #008B97
#008B97
oklch(58.1% 0.099 205.5)
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 #E40B23, closest first.
No curated palette has a color within ΔE 0.04 of #E40B23.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.027
- Red Pantone #EF233C ΔE 0.034
- Tomato Red #EC2D01 ΔE 0.038
- Cherry Red #F7022A ΔE 0.038
- Imperial Red #E63946 ΔE 0.042
- Cherry #CF0234 ΔE 0.048
- Vermillion #F4320C ΔE 0.052
- Fire Engine Red #FE0002 ΔE 0.053
Use #E40B23 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.