#E0311D
Closest named color: Tomato Red (#EC2D01). oklch(59.1% 0.213 30.6), rgb(224, 49, 29).
Aa
Black text reads best on this color (4.62:1).
About this color
#E0311D is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.213 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.024 away. Black text reads best on it, at 4.62:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #E0311D |
| RGB | rgb(224, 49, 29) |
| HSL | hsl(6, 77%, 50%) |
| OKLCH | oklch(59.1% 0.213 30.6) |
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 #E0311D | 4.53:1 | AA | Lc -75.3 | Fine for body text |
| Black text on #E0311D | 4.62:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #E0311D text on white | 4.53:1 | AA | Lc 69.8 | Content text, not long reading |
| #E0311D text on black | 4.62:1 | AA | Lc -31.9 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FACDC4
oklch(88.5% 0.053 31.3)
-
Step 300
300
#F8AA9B
oklch(81% 0.095 31.3)
-
Step 400
400
#F17764
oklch(70.7% 0.154 30.5)
-
Step 500
500
#E84C37
oklch(63.2% 0.196 30.8)
-
Step 600
600 (this color)
#E0311D
oklch(59.1% 0.213 30.6)
-
Step 700
700
#B51200
oklch(49.1% 0.194 30.6)
-
Step 800
800
#941305
oklch(42.7% 0.164 30.5)
-
Step 900
900
#771B10
oklch(37.7% 0.128 30.6)
-
Step 950
950
#46120B
oklch(26.9% 0.081 30.7)
#E0311D 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) | #6A5E17 | 0.228 |
| Deuteranopia (no green cones) | #94840E | 0.207 |
| Tritanopia (no blue cones) | #F7002F | 0.051 |
| Achromatopsia (no color) | #767676 | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E0311D
#E0311D
oklch(59.1% 0.213 30.6)
- #008DA0
#008DA0
oklch(59% 0.103 211.3)
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 #E0311D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.024
- Imperial Red #E63946 ΔE 0.037
- Vermillion #F4320C ΔE 0.040
- Red Pantone #EF233C ΔE 0.042
- Deep Orange #DC4D01 ΔE 0.045
- Crimson #DC143C ΔE 0.045
- Cherry Red #F7022A ΔE 0.049
- Faded Red #D3494E ΔE 0.049
Use #E0311D 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.