#E03E1B
Closest named color: Tomato Red (#EC2D01). oklch(60.2% 0.204 33.4), rgb(224, 62, 27).
Aa
Black text reads best on this color (4.87:1).
About this color
#E03E1B is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.204 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.025 away. Black text reads best on it, at 4.87:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.204) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #E03E1B |
| RGB | rgb(224, 62, 27) |
| HSL | hsl(11, 78%, 49%) |
| OKLCH | oklch(60.2% 0.204 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 #E03E1B | 4.30:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #E03E1B | 4.87:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #E03E1B text on white | 4.30:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #E03E1B text on black | 4.87:1 | AA | Lc -33.3 | 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
#FDE3DE
oklch(93.6% 0.03 30.6)
-
Step 200
200
#FBCDC2
oklch(88.5% 0.055 33.7)
-
Step 300
300
#FAA997
oklch(80.9% 0.1 33.1)
-
Step 400
400
#F3765B
oklch(70.7% 0.16 33.6)
-
Step 500
500 (this color)
#E03E1B
oklch(60.2% 0.204 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
#781904
oklch(37.6% 0.133 33.4)
-
Step 950
950
#471107
oklch(27% 0.084 32.9)
#E03E1B 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) | #706313 | 0.214 |
| Deuteranopia (no green cones) | #98870D | 0.194 |
| Tritanopia (no blue cones) | #F70038 | 0.064 |
| Achromatopsia (no color) | #7A7A7A | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E03E1B
#E03E1B
oklch(60.2% 0.204 33.4)
- #0091A7
#0091A7
oklch(60.3% 0.106 213.3)
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 #E03E1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.025
- Deep Orange #DC4D01 ΔE 0.028
- Vermillion #F4320C ΔE 0.037
- Imperial Red #E63946 ΔE 0.042
- Pale Red #D9544D ΔE 0.046
- Faded Red #D3494E ΔE 0.048
- Red Pantone #EF233C ΔE 0.050
- Dark Coral #CF524E ΔE 0.052
Use #E03E1B 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.