#EF3F42
Closest named color: Imperial Red (#E63946). oklch(63.2% 0.212 24.9), rgb(239, 63, 66).
Aa
Black text reads best on this color (5.45:1).
About this color
#EF3F42 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.212 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.023 away. Black text reads best on it, at 5.45:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.212) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 5.45:1 |
| White text | 3.84:1 |
Values
| HEX | #EF3F42 |
| RGB | rgb(239, 63, 66) |
| HSL | hsl(359, 85%, 59%) |
| OKLCH | oklch(63.2% 0.212 24.9) |
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 #EF3F42 | 3.84:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #EF3F42 | 5.45:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #EF3F42 text on white | 3.84:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #EF3F42 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
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FEE3E0
oklch(93.7% 0.03 25.3)
-
Step 200
200
#FDCBC6
oklch(88.4% 0.057 24.9)
-
Step 300
300
#FDA69F
oklch(80.9% 0.104 24.7)
-
Step 400
400
#F7716A
oklch(70.8% 0.166 25.2)
-
Step 500
500 (this color)
#EF3F42
oklch(63.2% 0.212 24.9)
-
Step 600
600
#D80023
oklch(55.6% 0.225 25)
-
Step 700
700
#B7001C
oklch(49.1% 0.199 25)
-
Step 800
800
#970016
oklch(42.6% 0.173 24.8)
-
Step 900
900
#7B1217
oklch(37.8% 0.138 25.1)
-
Step 950
950
#480E0F
oklch(26.9% 0.087 24.4)
#EF3F42 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) | #736A40 | 0.230 |
| Deuteranopia (no green cones) | #9F903C | 0.211 |
| Tritanopia (no blue cones) | #FF0042 | 0.046 |
| Achromatopsia (no color) | #828282 | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF3F42
#EF3F42
oklch(63.2% 0.212 24.9)
- #009CA9
#009CA9
oklch(63.2% 0.108 205.2)
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 #EF3F42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.023
- Strawberry #FB2943 ΔE 0.029
- Red Pantone #EF233C ΔE 0.029
- Pinky Red #FC2647 ΔE 0.033
- Vermillion #F4320C ΔE 0.034
- Orangey Red #FA4224 ΔE 0.034
- Light Red #FF474C ΔE 0.036
- Watermelon #FD4659 ΔE 0.038
Use #EF3F42 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.