#E42B23
Closest named color: Tomato Red (#EC2D01). oklch(59.4% 0.22 28.6), rgb(228, 43, 35).
Aa
Black text reads best on this color (4.66:1).
About this color
#E42B23 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.220 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.022 away. Black text reads best on it, at 4.66:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.220) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #E42B23 |
| RGB | rgb(228, 43, 35) |
| HSL | hsl(2, 78%, 52%) |
| OKLCH | oklch(59.4% 0.22 28.6) |
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 #E42B23 | 4.49:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #E42B23 | 4.66:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #E42B23 text on white | 4.49:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #E42B23 text on black | 4.66:1 | AA | Lc -32.3 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FECBC3
oklch(88.5% 0.059 28.6)
-
Step 300
300
#FEA699
oklch(80.9% 0.107 28.8)
-
Step 400
400
#F96F60
oklch(70.6% 0.172 28.4)
-
Step 500
500 (this color)
#E42B23
oklch(59.4% 0.22 28.6)
-
Step 600
600
#D90007
oklch(55.6% 0.228 28.7)
-
Step 700
700
#B80005
oklch(49.2% 0.201 28.7)
-
Step 800
800
#980003
oklch(42.7% 0.175 28.7)
-
Step 900
900
#7C0E0B
oklch(37.6% 0.143 28.5)
-
Step 950
950
#490D09
oklch(26.9% 0.091 28.6)
#E42B23 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) | #695D1F | 0.237 |
| Deuteranopia (no green cones) | #958516 | 0.216 |
| Tritanopia (no blue cones) | #FC002C | 0.048 |
| Achromatopsia (no color) | #777777 | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E42B23
#E42B23
oklch(59.4% 0.22 28.6)
- #008F9F
#008F9F
oklch(59.5% 0.102 208.6)
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 #E42B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.022
- Red Pantone #EF233C ΔE 0.032
- Imperial Red #E63946 ΔE 0.032
- Vermillion #F4320C ΔE 0.037
- Cherry Red #F7022A ΔE 0.039
- Crimson #DC143C ΔE 0.040
- Fire Engine Red #FE0002 ΔE 0.049
- Bright Red #FF000D ΔE 0.051
Use #E42B23 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.