#E31431
Closest named color: Crimson (#DC143C). oklch(58.3% 0.228 23.4), rgb(227, 20, 49).
Aa
White text reads best on this color (4.76:1).
About this color
#E31431 is a medium-dark, vivid red. In OKLCH its lightness is 58%, its chroma 0.228 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.019 away. White text reads best on it, at 4.76:1.
| Hue family | Reds |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.228) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.41:1 |
| White text | 4.76:1 |
Values
| HEX | #E31431 |
| RGB | rgb(227, 20, 49) |
| HSL | hsl(352, 84%, 48%) |
| OKLCH | oklch(58.3% 0.228 23.4) |
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 #E31431 | 4.76:1 | AA | Lc -76.1 | Fine for body text |
| Black text on #E31431 | 4.41:1 | AA large text | Lc 33.4 | Non-text elements, placeholder text |
| #E31431 text on white | 4.76:1 | AA | Lc 70.6 | Content text, not long reading |
| #E31431 text on black | 4.41:1 | 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
#FDE3E0
oklch(93.6% 0.029 25.6)
-
Step 200
200
#FDCBC7
oklch(88.5% 0.057 23.6)
-
Step 300
300
#FCA6A1
oklch(80.8% 0.103 23.2)
-
Step 400
400
#F6716E
oklch(70.7% 0.164 23.5)
-
Step 500
500
#EE3F47
oklch(63.1% 0.211 23.4)
-
Step 600
600 (this color)
#E31431
oklch(58.3% 0.228 23.4)
-
Step 700
700
#B70022
oklch(49.2% 0.199 23.5)
-
Step 800
800
#97001A
oklch(42.7% 0.172 23.6)
-
Step 900
900
#7A121B
oklch(37.6% 0.137 23.2)
-
Step 950
950
#480E10
oklch(26.9% 0.087 23.5)
#E31431 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) | #605830 | 0.253 |
| Deuteranopia (no green cones) | #918128 | 0.227 |
| Tritanopia (no blue cones) | #FA0024 | 0.045 |
| Achromatopsia (no color) | #737373 | 0.230 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E31431
#E31431
oklch(58.3% 0.228 23.4)
- #008C96
#008C96
oklch(58.3% 0.099 203.7)
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 #E31431, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.019
- Red Pantone #EF233C ΔE 0.030
- Imperial Red #E63946 ΔE 0.036
- Cherry Red #F7022A ΔE 0.039
- Tomato Red #EC2D01 ΔE 0.044
- Lipstick #D5174E ΔE 0.045
- Cherry #CF0234 ΔE 0.045
- Pink Red #F5054F ΔE 0.048
Use #E31431 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.