#E23729
Closest named color: Tomato Red (#EC2D01). oklch(60% 0.209 29.4), rgb(226, 55, 41).
Aa
Black text reads best on this color (4.81:1).
About this color
#E23729 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.209 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.023 away. Black text reads best on it, at 4.81:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.209) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #E23729 |
| RGB | rgb(226, 55, 41) |
| HSL | hsl(5, 76%, 52%) |
| OKLCH | oklch(60% 0.209 29.4) |
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 #E23729 | 4.36:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #E23729 | 4.81:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #E23729 text on white | 4.36:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #E23729 text on black | 4.81:1 | AA | Lc -33.0 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FDCCC4
oklch(88.6% 0.057 29)
-
Step 300
300
#FCA79A
oklch(80.9% 0.103 29)
-
Step 400
400
#F57362
oklch(70.6% 0.163 29.4)
-
Step 500
500 (this color)
#E23729
oklch(60% 0.209 29.4)
-
Step 600
600
#D90400
oklch(55.7% 0.227 29.4)
-
Step 700
700
#B70300
oklch(49% 0.2 29.4)
-
Step 800
800
#980200
oklch(42.8% 0.174 29.4)
-
Step 900
900
#7A150D
oklch(37.7% 0.137 29.6)
-
Step 950
950
#48100A
oklch(27.1% 0.086 29.8)
#E23729 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) | #6D6125 | 0.223 |
| Deuteranopia (no green cones) | #968620 | 0.203 |
| Tritanopia (no blue cones) | #F90036 | 0.053 |
| Achromatopsia (no color) | #797979 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E23729
#E23729
oklch(60% 0.209 29.4)
- #0091A2
#0091A2
oklch(60.1% 0.104 209.3)
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 #E23729, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.023
- Imperial Red #E63946 ΔE 0.029
- Vermillion #F4320C ΔE 0.036
- Red Pantone #EF233C ΔE 0.036
- Deep Orange #DC4D01 ΔE 0.043
- Faded Red #D3494E ΔE 0.043
- Cherry Red #F7022A ΔE 0.046
- Pale Red #D9544D ΔE 0.046
Use #E23729 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.