#E43F0B
Closest named color: Tomato Red (#EC2D01). oklch(60.9% 0.208 35.1), rgb(228, 63, 11).
Aa
Black text reads best on this color (5.01:1).
About this color
#E43F0B is a medium-dark, vivid red. In OKLCH its lightness is 61%, its chroma 0.208 and its hue 35°. 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 5.01:1.
| Hue family | Reds |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.208) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #E43F0B |
| RGB | rgb(228, 63, 11) |
| HSL | hsl(14, 91%, 47%) |
| OKLCH | oklch(60.9% 0.208 35.1) |
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 #E43F0B | 4.18:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #E43F0B | 5.01:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #E43F0B text on white | 4.18:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #E43F0B text on black | 5.01:1 | AA | Lc -34.3 | 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
#FEF2EF
oklch(97% 0.014 34.3)
-
Step 100
100
#FDE3DD
oklch(93.5% 0.03 33.1)
-
Step 200
200
#FCCDC0
oklch(88.6% 0.056 36)
-
Step 300
300
#FBA994
oklch(81% 0.102 35)
-
Step 400
400
#F47556
oklch(70.6% 0.163 34.9)
-
Step 500
500 (this color)
#E43F0B
oklch(60.9% 0.208 35.1)
-
Step 600
600
#CC3400
oklch(55.7% 0.195 35.1)
-
Step 700
700
#AC2A00
oklch(49% 0.172 35)
-
Step 800
800
#8E2100
oklch(42.6% 0.149 35.1)
-
Step 900
900
#781B00
oklch(37.8% 0.132 35.3)
-
Step 950
950
#471104
oklch(26.9% 0.085 35.3)
#E43F0B 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) | #726400 | 0.217 |
| Deuteranopia (no green cones) | #9B8900 | 0.194 |
| Tritanopia (no blue cones) | #FC0038 | 0.069 |
| Achromatopsia (no color) | #7C7C7C | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E43F0B
#E43F0B
oklch(60.9% 0.208 35.1)
- #0093AB
#0093AB
oklch(61% 0.108 214.6)
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 #E43F0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.022
- Deep Orange #DC4D01 ΔE 0.025
- Vermillion #F4320C ΔE 0.031
- Orangey Red #FA4224 ΔE 0.046
- Imperial Red #E63946 ΔE 0.047
- Red Orange #FD3C06 ΔE 0.048
- Pale Red #D9544D ΔE 0.050
- Orangered #FE420F ΔE 0.052
Use #E43F0B 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.