#EF4027
Closest named color: Vermillion (#F4320C). oklch(63% 0.215 31.3), rgb(239, 64, 39).
Aa
Black text reads best on this color (5.43:1).
About this color
#EF4027 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.215 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.017 away. Black text reads best on it, at 5.43:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.215) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #EF4027 |
| RGB | rgb(239, 64, 39) |
| HSL | hsl(8, 86%, 55%) |
| OKLCH | oklch(63% 0.215 31.3) |
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 #EF4027 | 3.86:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #EF4027 | 5.43:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #EF4027 text on white | 3.86:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #EF4027 text on black | 5.43:1 | AA | Lc -37.0 | 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
#FDCCC2
oklch(88.5% 0.058 31.6)
-
Step 300
300
#FDA797
oklch(80.9% 0.105 31)
-
Step 400
400
#F7725C
oklch(70.7% 0.168 31.2)
-
Step 500
500 (this color)
#EF4027
oklch(63% 0.215 31.3)
-
Step 600
600
#D41F00
oklch(55.6% 0.215 31.3)
-
Step 700
700
#B31800
oklch(49% 0.189 31.3)
-
Step 800
800
#941200
oklch(42.6% 0.165 31.3)
-
Step 900
900
#7B1304
oklch(37.7% 0.14 31.5)
-
Step 950
950
#490F07
oklch(27.1% 0.089 31.3)
#EF4027 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) | #766921 | 0.228 |
| Deuteranopia (no green cones) | #A1901C | 0.208 |
| Tritanopia (no blue cones) | #FF003C | 0.055 |
| Achromatopsia (no color) | #828282 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF4027
#EF4027
oklch(63% 0.215 31.3)
- #009AAF
#009AAF
oklch(63% 0.11 211.6)
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 #EF4027, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.017
- Orangey Red #FA4224 ΔE 0.022
- Tomato Red #EC2D01 ΔE 0.025
- Red Orange #FD3C06 ΔE 0.028
- Orangered #FE420F ΔE 0.032
- Orange Red #FF4500 ΔE 0.037
- Imperial Red #E63946 ΔE 0.039
- Blood Orange #FE4B03 ΔE 0.040
Use #EF4027 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.