#E03E09
Closest named color: Deep Orange (#DC4D01). oklch(60.1% 0.205 35.3), rgb(224, 62, 9).
Aa
Black text reads best on this color (4.86:1).
About this color
#E03E09 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.205 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Orange (#DC4D01), ΔE 0.024 away. Black text reads best on it, at 4.86:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.205) |
| Temperature | warm |
| Nearest name | Deep Orange (#DC4D01) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #E03E09 |
| RGB | rgb(224, 62, 9) |
| HSL | hsl(15, 92%, 46%) |
| OKLCH | oklch(60.1% 0.205 35.3) |
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 #E03E09 | 4.31:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #E03E09 | 4.86:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #E03E09 text on white | 4.31:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #E03E09 text on black | 4.86:1 | AA | Lc -33.2 | 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FDE4DD
oklch(93.7% 0.029 36.2)
-
Step 200
200
#FCCDC0
oklch(88.6% 0.056 36)
-
Step 300
300
#FAA994
oklch(80.8% 0.101 35.2)
-
Step 400
400
#F37657
oklch(70.6% 0.161 35.1)
-
Step 500
500 (this color)
#E03E09
oklch(60.1% 0.205 35.3)
-
Step 600
600
#CB3500
oklch(55.6% 0.193 35.4)
-
Step 700
700
#AC2B00
oklch(49.1% 0.171 35.3)
-
Step 800
800
#8E2200
oklch(42.7% 0.148 35.4)
-
Step 900
900
#781B00
oklch(37.8% 0.132 35.3)
-
Step 950
950
#471104
oklch(26.9% 0.085 35.3)
#E03E09 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) | #716300 | 0.213 |
| Deuteranopia (no green cones) | #988700 | 0.192 |
| Tritanopia (no blue cones) | #F70037 | 0.068 |
| Achromatopsia (no color) | #7A7A7A | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E03E09
#E03E09
oklch(60.1% 0.205 35.3)
- #0090A8
#0090A8
oklch(60.1% 0.106 215)
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 #E03E09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Orange #DC4D01 ΔE 0.024
- Tomato Red #EC2D01 ΔE 0.026
- Vermillion #F4320C ΔE 0.038
- Imperial Red #E63946 ΔE 0.048
- Pale Red #D9544D ΔE 0.051
- Rusty Orange #CD5909 ΔE 0.053
- Faded Red #D3494E ΔE 0.054
- Orangey Red #FA4224 ΔE 0.054
Use #E03E09 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.