#E73D01
Closest named color: Tomato Red (#EC2D01). oklch(61.2% 0.213 35.2), rgb(231, 61, 1).
Aa
Black text reads best on this color (5.06:1).
About this color
#E73D01 is a medium-dark, vivid red. In OKLCH its lightness is 61%, its chroma 0.213 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.019 away. Black text reads best on it, at 5.06:1.
| Hue family | Reds |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #E73D01 |
| RGB | rgb(231, 61, 1) |
| HSL | hsl(16, 99%, 45%) |
| OKLCH | oklch(61.2% 0.213 35.2) |
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 #E73D01 | 4.14:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #E73D01 | 5.06:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #E73D01 text on white | 4.14:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #E73D01 text on black | 5.06:1 | AA | Lc -34.7 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FDE3DC
oklch(93.5% 0.03 35.5)
-
Step 200
200
#FDCCC0
oklch(88.5% 0.058 34.1)
-
Step 300
300
#FCA893
oklch(80.9% 0.104 34.7)
-
Step 400
400
#F67454
oklch(70.7% 0.167 35)
-
Step 500
500 (this color)
#E73D01
oklch(61.2% 0.213 35.2)
-
Step 600
600
#CB3400
oklch(55.5% 0.194 35.2)
-
Step 700
700
#AC2B00
oklch(49.1% 0.171 35.3)
-
Step 800
800
#8E2200
oklch(42.7% 0.148 35.4)
-
Step 900
900
#781B00
oklch(37.8% 0.132 35.3)
-
Step 950
950
#481003
oklch(27% 0.088 35.2)
#E73D01 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) | #736400 | 0.221 |
| Deuteranopia (no green cones) | #9C8A00 | 0.198 |
| Tritanopia (no blue cones) | #FF0035 | 0.067 |
| Achromatopsia (no color) | #7C7C7C | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E73D01
#E73D01
oklch(61.2% 0.213 35.2)
- #0094AC
#0094AC
oklch(61.3% 0.108 214.5)
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 #E73D01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.019
- Vermillion #F4320C ΔE 0.026
- Deep Orange #DC4D01 ΔE 0.029
- Orangey Red #FA4224 ΔE 0.042
- Red Orange #FD3C06 ΔE 0.043
- Orangered #FE420F ΔE 0.047
- Imperial Red #E63946 ΔE 0.048
- Orange Red #FF4500 ΔE 0.051
Use #E73D01 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.