#E33910
Closest named color: Tomato Red (#EC2D01). oklch(60.2% 0.211 33.5), rgb(227, 57, 16).
Aa
Black text reads best on this color (4.85:1).
About this color
#E33910 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.211 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.018 away. Black text reads best on it, at 4.85:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.211) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #E33910 |
| RGB | rgb(227, 57, 16) |
| HSL | hsl(12, 87%, 48%) |
| OKLCH | oklch(60.2% 0.211 33.5) |
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 #E33910 | 4.32:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #E33910 | 4.85:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #E33910 text on white | 4.32:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #E33910 text on black | 4.85:1 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FDE3DD
oklch(93.5% 0.03 33.1)
-
Step 200
200
#FDCCC1
oklch(88.5% 0.058 32.8)
-
Step 300
300
#FCA895
oklch(80.9% 0.104 33.3)
-
Step 400
400
#F67458
oklch(70.8% 0.166 33.6)
-
Step 500
500 (this color)
#E33910
oklch(60.2% 0.211 33.5)
-
Step 600
600
#CF2D00
oklch(55.6% 0.202 33.6)
-
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
#7A1600
oklch(37.7% 0.137 33.5)
-
Step 950
950
#481005
oklch(27% 0.087 33.6)
#E33910 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) | #6F6102 | 0.223 |
| Deuteranopia (no green cones) | #988700 | 0.201 |
| Tritanopia (no blue cones) | #FB0033 | 0.061 |
| Achromatopsia (no color) | #7A7A7A | 0.213 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E33910
#E33910
oklch(60.2% 0.211 33.5)
- #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 #E33910, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.018
- Vermillion #F4320C ΔE 0.032
- Deep Orange #DC4D01 ΔE 0.032
- Imperial Red #E63946 ΔE 0.043
- Red Pantone #EF233C ΔE 0.048
- Orangey Red #FA4224 ΔE 0.050
- Red Orange #FD3C06 ΔE 0.052
- Pale Red #D9544D ΔE 0.052
Use #E33910 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.