#E01818
Closest named color: Crimson (#DC143C). oklch(57.7% 0.226 28.3), rgb(224, 24, 24).
Aa
White text reads best on this color (4.86:1).
About this color
#E01818 is a medium-dark, vivid red. In OKLCH its lightness is 58%, its chroma 0.226 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.033 away. White text reads best on it, at 4.86:1.
| Hue family | Reds |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.226) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #E01818 |
| RGB | rgb(224, 24, 24) |
| HSL | hsl(0, 81%, 49%) |
| OKLCH | oklch(57.7% 0.226 28.3) |
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 #E01818 | 4.86:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #E01818 | 4.31:1 | AA large text | Lc 32.7 | Non-text elements, placeholder text |
| #E01818 text on white | 4.86:1 | AA | Lc 71.4 | Content text, not long reading |
| #E01818 text on black | 4.31:1 | AA large text | Lc -30.3 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FDCCC4
oklch(88.6% 0.057 29)
-
Step 300
300
#FCA79B
oklch(80.9% 0.103 28.3)
-
Step 400
400
#F57364
oklch(70.7% 0.163 28.5)
-
Step 500
500
#ED4338
oklch(63.1% 0.208 28.3)
-
Step 600
600 (this color)
#E01818
oklch(57.7% 0.226 28.3)
-
Step 700
700
#B80008
oklch(49.2% 0.201 28.3)
-
Step 800
800
#980106
oklch(42.8% 0.174 28.3)
-
Step 900
900
#7A1511
oklch(37.8% 0.136 28.2)
-
Step 950
950
#48100C
oklch(27.1% 0.086 28.3)
#E01818 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) | #625612 | 0.247 |
| Deuteranopia (no green cones) | #908001 | 0.223 |
| Tritanopia (no blue cones) | #F7001D | 0.045 |
| Achromatopsia (no color) | #717171 | 0.228 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E01818
#E01818
oklch(57.7% 0.226 28.3)
- #008998
#008998
oklch(57.6% 0.099 208.3)
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 #E01818, closest first.
No curated palette has a color within ΔE 0.04 of #E01818.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.033
- Tomato Red #EC2D01 ΔE 0.036
- Red Pantone #EF233C ΔE 0.043
- Imperial Red #E63946 ΔE 0.046
- Cherry Red #F7022A ΔE 0.047
- Cherry #CF0234 ΔE 0.048
- Vermillion #F4320C ΔE 0.052
- Fire Engine Red #FE0002 ΔE 0.058
Use #E01818 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.