#EF420C
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.216 35), rgb(239, 66, 12).
Aa
Black text reads best on this color (5.45:1).
About this color
#EF420C is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.216 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.019 away. Black text reads best on it, at 5.45:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.216) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.45:1 |
| White text | 3.84:1 |
Values
| HEX | #EF420C |
| RGB | rgb(239, 66, 12) |
| HSL | hsl(14, 90%, 49%) |
| OKLCH | oklch(63.1% 0.216 35) |
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 #EF420C | 3.84:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #EF420C | 5.45:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #EF420C text on white | 3.84:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #EF420C text on black | 5.45:1 | AA | Lc -37.2 | 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
#FEE3DC
oklch(93.6% 0.031 34.9)
-
Step 200
200
#FDCCBF
oklch(88.4% 0.059 35.3)
-
Step 300
300
#FDA892
oklch(81% 0.106 35.2)
-
Step 400
400
#F77353
oklch(70.7% 0.169 34.9)
-
Step 500
500 (this color)
#EF420C
oklch(63.1% 0.216 35)
-
Step 600
600
#CC3400
oklch(55.7% 0.195 35.1)
-
Step 700
700
#AC2A00
oklch(49% 0.172 35)
-
Step 800
800
#8F2100
oklch(42.8% 0.15 35)
-
Step 900
900
#781A00
oklch(37.7% 0.132 34.9)
-
Step 950
950
#490F02
oklch(27% 0.09 35.1)
#EF420C 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) | #786900 | 0.225 |
| Deuteranopia (no green cones) | #A29000 | 0.203 |
| Tritanopia (no blue cones) | #FF003A | 0.065 |
| Achromatopsia (no color) | #828282 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF420C
#EF420C
oklch(63.1% 0.216 35)
- #009AB3
#009AB3
oklch(63.1% 0.111 214.6)
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 #EF420C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.019
- Orangey Red #FA4224 ΔE 0.024
- Red Orange #FD3C06 ΔE 0.026
- Tomato Red #EC2D01 ΔE 0.027
- Orangered #FE420F ΔE 0.029
- Orange Red #FF4500 ΔE 0.032
- Blood Orange #FE4B03 ΔE 0.035
- Deep Orange #DC4D01 ΔE 0.038
Use #EF420C 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.