#EC4536
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.206 29.3), rgb(236, 69, 54).
Aa
Black text reads best on this color (5.47:1).
About this color
#EC4536 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.206 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.028 away. Black text reads best on it, at 5.47:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.206) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #EC4536 |
| RGB | rgb(236, 69, 54) |
| HSL | hsl(5, 83%, 57%) |
| OKLCH | oklch(63.1% 0.206 29.3) |
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 #EC4536 | 3.83:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #EC4536 | 5.47:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #EC4536 text on white | 3.83:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #EC4536 text on black | 5.47:1 | AA | Lc -37.1 | 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
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FCCCC4
oklch(88.5% 0.056 29.2)
-
Step 300
300
#FBA89B
oklch(80.9% 0.101 29.2)
-
Step 400
400
#F47463
oklch(70.7% 0.161 29.4)
-
Step 500
500 (this color)
#EC4536
oklch(63.1% 0.206 29.3)
-
Step 600
600
#D70C07
oklch(55.5% 0.224 29.2)
-
Step 700
700
#B80000
oklch(49.1% 0.202 29.2)
-
Step 800
800
#970503
oklch(42.7% 0.172 29.2)
-
Step 900
900
#79160F
oklch(37.6% 0.134 29.2)
-
Step 950
950
#47100B
oklch(26.9% 0.085 29.1)
#EC4536 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) | #776B33 | 0.218 |
| Deuteranopia (no green cones) | #A08F2F | 0.199 |
| Tritanopia (no blue cones) | #FF0043 | 0.060 |
| Achromatopsia (no color) | #828282 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC4536
#EC4536
oklch(63.1% 0.206 29.3)
- #009BAD
#009BAD
oklch(63.1% 0.109 209.2)
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 #EC4536, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.028
- Orangey Red #FA4224 ΔE 0.028
- Imperial Red #E63946 ΔE 0.032
- Tomato Red #EC2D01 ΔE 0.034
- Red Orange #FD3C06 ΔE 0.037
- Orangered #FE420F ΔE 0.039
- Pale Red #D9544D ΔE 0.040
- Red Pantone #EF233C ΔE 0.040
Use #EC4536 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.