#E23403
Closest named color: Tomato Red (#EC2D01). oklch(59.6% 0.215 33.7), rgb(226, 52, 3).
Aa
Black text reads best on this color (4.72:1).
About this color
#E23403 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.215 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.019 away. Black text reads best on it, at 4.72:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.215) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #E23403 |
| RGB | rgb(226, 52, 3) |
| HSL | hsl(13, 97%, 45%) |
| OKLCH | oklch(59.6% 0.215 33.7) |
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 #E23403 | 4.44:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #E23403 | 4.72:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #E23403 text on white | 4.44:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #E23403 text on black | 4.72:1 | AA | Lc -32.6 | 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
#FDCCC0
oklch(88.5% 0.058 34.1)
-
Step 300
300
#FDA894
oklch(81% 0.105 33.9)
-
Step 400
400
#F77356
oklch(70.7% 0.168 33.8)
-
Step 500
500 (this color)
#E23403
oklch(59.6% 0.215 33.7)
-
Step 600
600
#CF2D00
oklch(55.6% 0.202 33.6)
-
Step 700
700
#AF2500
oklch(49.1% 0.178 33.7)
-
Step 800
800
#911D00
oklch(42.8% 0.155 33.7)
-
Step 900
900
#7A1700
oklch(37.8% 0.137 33.8)
-
Step 950
950
#480F04
oklch(26.9% 0.089 33.7)
#E23403 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) | #6D5F00 | 0.225 |
| Deuteranopia (no green cones) | #978500 | 0.201 |
| Tritanopia (no blue cones) | #FA002E | 0.058 |
| Achromatopsia (no color) | #787878 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E23403
#E23403
oklch(59.6% 0.215 33.7)
- #008EA5
#008EA5
oklch(59.5% 0.105 214.4)
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 #E23403, closest first.
No curated palette has a color within ΔE 0.04 of #E23403.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.019
- Vermillion #F4320C ΔE 0.035
- Deep Orange #DC4D01 ΔE 0.036
- Imperial Red #E63946 ΔE 0.046
- Red Pantone #EF233C ΔE 0.049
- Cherry Red #F7022A ΔE 0.053
- Fire Engine Red #FE0002 ΔE 0.055
- Orangey Red #FA4224 ΔE 0.056
Use #E23403 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.