#E21F2C
Closest named color: Crimson (#DC143C). oklch(58.5% 0.223 25.4), rgb(226, 31, 44).
Aa
White text reads best on this color (4.70:1).
About this color
#E21F2C is a medium-dark, vivid red. In OKLCH its lightness is 58%, its chroma 0.223 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.025 away. White text reads best on it, at 4.70:1.
| Hue family | Reds |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.223) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #E21F2C |
| RGB | rgb(226, 31, 44) |
| HSL | hsl(356, 77%, 50%) |
| OKLCH | oklch(58.5% 0.223 25.4) |
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 #E21F2C | 4.70:1 | AA | Lc -76.0 | Fine for body text |
| Black text on #E21F2C | 4.46:1 | AA large text | Lc 33.6 | Non-text elements, placeholder text |
| #E21F2C text on white | 4.70:1 | AA | Lc 70.5 | Content text, not long reading |
| #E21F2C text on black | 4.46:1 | AA large text | Lc -31.2 | 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 600.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FDE3E0
oklch(93.6% 0.029 25.6)
-
Step 200
200
#FCCCC6
oklch(88.5% 0.055 26.5)
-
Step 300
300
#FBA79F
oklch(80.9% 0.101 25.5)
-
Step 400
400
#F4736B
oklch(70.7% 0.16 25.6)
-
Step 500
500
#EC4343
oklch(63.1% 0.206 25.3)
-
Step 600
600 (this color)
#E21F2C
oklch(58.5% 0.223 25.4)
-
Step 700
700
#B7001A
oklch(49.1% 0.199 25.4)
-
Step 800
800
#970214
oklch(42.7% 0.172 25.5)
-
Step 900
900
#791518
oklch(37.6% 0.134 25.3)
-
Step 950
950
#47100F
oklch(26.9% 0.084 25.7)
#E21F2C 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) | #63592A | 0.245 |
| Deuteranopia (no green cones) | #928222 | 0.222 |
| Tritanopia (no blue cones) | #F90027 | 0.043 |
| Achromatopsia (no color) | #747474 | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E21F2C
#E21F2C
oklch(58.5% 0.223 25.4)
- #008C98
#008C98
oklch(58.4% 0.1 205.4)
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 #E21F2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.025
- Red Pantone #EF233C ΔE 0.031
- Imperial Red #E63946 ΔE 0.034
- Tomato Red #EC2D01 ΔE 0.037
- Cherry Red #F7022A ΔE 0.040
- Cherry #CF0234 ΔE 0.048
- Vermillion #F4320C ΔE 0.050
- Lipstick #D5174E ΔE 0.051
Use #E21F2C 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.