#EC4803
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.21 37.1), rgb(236, 72, 3).
Aa
Black text reads best on this color (5.49:1).
About this color
#EC4803 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.210 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.030 away. Black text reads best on it, at 5.49:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.210) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.49:1 |
| White text | 3.82:1 |
Values
| HEX | #EC4803 |
| RGB | rgb(236, 72, 3) |
| HSL | hsl(18, 97%, 47%) |
| OKLCH | oklch(63.1% 0.21 37.1) |
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 #EC4803 | 3.82:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #EC4803 | 5.49:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #EC4803 text on white | 3.82:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #EC4803 text on black | 5.49:1 | AA | Lc -37.3 | 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FDE4DC
oklch(93.7% 0.03 38.6)
-
Step 200
200
#FCCDBF
oklch(88.5% 0.057 37.2)
-
Step 300
300
#FBA991
oklch(80.9% 0.103 37)
-
Step 400
400
#F47651
oklch(70.7% 0.164 37.1)
-
Step 500
500 (this color)
#EC4803
oklch(63.1% 0.21 37.1)
-
Step 600
600
#C83B00
oklch(55.7% 0.186 37.1)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#761F00
oklch(37.8% 0.126 37.1)
-
Step 950
950
#471102
oklch(26.9% 0.086 36.9)
#EC4803 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) | #7A6B00 | 0.214 |
| Deuteranopia (no green cones) | #A29000 | 0.193 |
| Tritanopia (no blue cones) | #FF003F | 0.078 |
| Achromatopsia (no color) | #828282 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC4803
#EC4803
oklch(63.1% 0.21 37.1)
- #0099B6
#0099B6
oklch(63% 0.113 217.6)
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 #EC4803, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.030
- Deep Orange #DC4D01 ΔE 0.030
- Orangey Red #FA4224 ΔE 0.031
- Red Orange #FD3C06 ΔE 0.033
- Orangered #FE420F ΔE 0.034
- Tomato Red #EC2D01 ΔE 0.034
- Orange Red #FF4500 ΔE 0.036
- Blood Orange #FE4B03 ΔE 0.036
Use #EC4803 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.