#E03B16
Closest named color: Tomato Red (#EC2D01). oklch(59.9% 0.207 33.4), rgb(224, 59, 22).
Aa
Black text reads best on this color (4.80:1).
About this color
#E03B16 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 0.024 away. Black text reads best on it, at 4.80:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.80:1 |
| White text | 4.36:1 |
Values
| HEX | #E03B16 |
| RGB | rgb(224, 59, 22) |
| HSL | hsl(11, 82%, 48%) |
| OKLCH | oklch(59.9% 0.207 33.4) |
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 #E03B16 | 4.36:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #E03B16 | 4.80:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #E03B16 text on white | 4.36:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #E03B16 text on black | 4.80:1 | AA | Lc -32.9 | 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 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
#FCCDC1
oklch(88.6% 0.056 34.7)
-
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)
#E03B16
oklch(59.9% 0.207 33.4)
-
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
#791802
oklch(37.7% 0.135 33.6)
-
Step 950
950
#471106
oklch(26.9% 0.085 33.7)
#E03B16 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) | #6F610B | 0.217 |
| Deuteranopia (no green cones) | #978603 | 0.196 |
| Tritanopia (no blue cones) | #F70035 | 0.062 |
| Achromatopsia (no color) | #797979 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E03B16
#E03B16
oklch(59.9% 0.207 33.4)
- #0090A5
#0090A5
oklch(60% 0.105 212.6)
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 #E03B16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.024
- Deep Orange #DC4D01 ΔE 0.030
- Vermillion #F4320C ΔE 0.037
- Imperial Red #E63946 ΔE 0.043
- Pale Red #D9544D ΔE 0.049
- Red Pantone #EF233C ΔE 0.050
- Faded Red #D3494E ΔE 0.050
- Dark Coral #CF524E ΔE 0.054
Use #E03B16 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.