#E5431B
Closest named color: Tomato Red (#EC2D01). oklch(61.5% 0.205 34.3), rgb(229, 67, 27).
Aa
Black text reads best on this color (5.15:1).
About this color
#E5431B is a medium-dark, vivid red. In OKLCH its lightness is 62%, its chroma 0.205 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.025 away. Black text reads best on it, at 5.15:1.
| Hue family | Reds |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.205) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #E5431B |
| RGB | rgb(229, 67, 27) |
| HSL | hsl(12, 80%, 50%) |
| OKLCH | oklch(61.5% 0.205 34.3) |
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 #E5431B | 4.07:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #E5431B | 5.15:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #E5431B text on white | 4.07:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #E5431B text on black | 5.15:1 | AA | Lc -35.1 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FDE4DD
oklch(93.7% 0.029 36.2)
-
Step 200
200
#FCCDC1
oklch(88.6% 0.056 34.7)
-
Step 300
300
#FAA995
oklch(80.9% 0.1 34.5)
-
Step 400
400
#F37659
oklch(70.7% 0.16 34.3)
-
Step 500
500 (this color)
#E5431B
oklch(61.5% 0.205 34.3)
-
Step 600
600
#CD3000
oklch(55.5% 0.199 34.2)
-
Step 700
700
#AE2700
oklch(49.1% 0.176 34.2)
-
Step 800
800
#901F00
oklch(42.8% 0.153 34.3)
-
Step 900
900
#791901
oklch(37.8% 0.134 34.2)
-
Step 950
950
#471106
oklch(26.9% 0.085 33.7)
#E5431B 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) | #746711 | 0.214 |
| Deuteranopia (no green cones) | #9C8B0C | 0.194 |
| Tritanopia (no blue cones) | #FC003C | 0.070 |
| Achromatopsia (no color) | #7E7E7E | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E5431B
#E5431B
oklch(61.5% 0.205 34.3)
- #0095AD
#0095AD
oklch(61.6% 0.109 214.4)
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 #E5431B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.025
- Deep Orange #DC4D01 ΔE 0.025
- Vermillion #F4320C ΔE 0.030
- Orangey Red #FA4224 ΔE 0.041
- Imperial Red #E63946 ΔE 0.043
- Red Orange #FD3C06 ΔE 0.045
- Pale Red #D9544D ΔE 0.045
- Orangered #FE420F ΔE 0.048
Use #E5431B 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.