#E03A15
Closest named color: Tomato Red (#EC2D01). oklch(59.8% 0.207 33.3), rgb(224, 58, 21).
Aa
Black text reads best on this color (4.78:1).
About this color
#E03A15 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.207 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.023 away. Black text reads best on it, at 4.78:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #E03A15 |
| RGB | rgb(224, 58, 21) |
| HSL | hsl(11, 83%, 48%) |
| OKLCH | oklch(59.8% 0.207 33.3) |
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 #E03A15 | 4.38:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #E03A15 | 4.78:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #E03A15 text on white | 4.38:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #E03A15 text on black | 4.78:1 | AA | Lc -32.8 | 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 500.
-
Step 50
50
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FDE3DD
oklch(93.5% 0.03 33.1)
-
Step 200
200
#FCCCC1
oklch(88.4% 0.057 33.1)
-
Step 300
300
#FBA996
oklch(81% 0.101 33.6)
-
Step 400
400
#F4755A
oklch(70.7% 0.162 33.4)
-
Step 500
500 (this color)
#E03A15
oklch(59.8% 0.207 33.3)
-
Step 600
600
#CF2C00
oklch(55.6% 0.203 33.4)
-
Step 700
700
#AF2400
oklch(49.1% 0.179 33.5)
-
Step 800
800
#911C00
oklch(42.7% 0.156 33.4)
-
Step 900
900
#791702
oklch(37.6% 0.135 33.3)
-
Step 950
950
#471106
oklch(26.9% 0.085 33.7)
#E03A15 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) | #6E610A | 0.219 |
| Deuteranopia (no green cones) | #978601 | 0.198 |
| Tritanopia (no blue cones) | #F70035 | 0.061 |
| Achromatopsia (no color) | #787878 | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E03A15
#E03A15
oklch(59.8% 0.207 33.3)
- #008FA5
#008FA5
oklch(59.7% 0.105 213.5)
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 #E03A15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.023
- Deep Orange #DC4D01 ΔE 0.032
- Vermillion #F4320C ΔE 0.038
- Imperial Red #E63946 ΔE 0.043
- Red Pantone #EF233C ΔE 0.049
- Faded Red #D3494E ΔE 0.050
- Pale Red #D9544D ΔE 0.050
- Dark Coral #CF524E ΔE 0.055
Use #E03A15 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.