#E4301F
Closest named color: Tomato Red (#EC2D01). oklch(59.8% 0.217 30), rgb(228, 48, 31).
Aa
Black text reads best on this color (4.74:1).
About this color
#E4301F is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.217 and its hue 30°. 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 4.74:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.217) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #E4301F |
| RGB | rgb(228, 48, 31) |
| HSL | hsl(5, 78%, 51%) |
| OKLCH | oklch(59.8% 0.217 30) |
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 #E4301F | 4.42:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #E4301F | 4.74:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #E4301F text on white | 4.42:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #E4301F text on black | 4.74:1 | AA | Lc -32.7 | 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
#FECBC2
oklch(88.4% 0.06 29.9)
-
Step 300
300
#FEA698
oklch(80.9% 0.107 29.5)
-
Step 400
400
#F8715E
oklch(70.7% 0.169 30)
-
Step 500
500 (this color)
#E4301F
oklch(59.8% 0.217 30)
-
Step 600
600
#D71100
oklch(55.6% 0.223 30.1)
-
Step 700
700
#B60C00
oklch(49.1% 0.197 30)
-
Step 800
800
#970800
oklch(42.8% 0.171 30)
-
Step 900
900
#7C1108
oklch(37.8% 0.142 29.9)
-
Step 950
950
#490E08
oklch(27% 0.09 29.9)
#E4301F 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) | #6B5F19 | 0.233 |
| Deuteranopia (no green cones) | #978610 | 0.211 |
| Tritanopia (no blue cones) | #FC002F | 0.051 |
| Achromatopsia (no color) | #787878 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E4301F
#E4301F
oklch(59.8% 0.217 30)
- #0090A1
#0090A1
oklch(59.8% 0.103 209.4)
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 #E4301F, 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 0.033
- Imperial Red #E63946 ΔE 0.034
- Red Pantone #EF233C ΔE 0.036
- Cherry Red #F7022A ΔE 0.042
- Deep Orange #DC4D01 ΔE 0.046
- Crimson #DC143C ΔE 0.047
- Fire Engine Red #FE0002 ΔE 0.049
Use #E4301F 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.