#efff66

Color #efff66

A vivid, highly saturated light yellow.

Closest named color Yellow Green #9acd32 · ΔE 23.97 Nearest Tailwind class lime-300 #bbf451 · ΔE 8.1

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#efff66

RGB

rgb(239, 255, 102)

HSL

hsl(66.3, 100%, 70%)

HSV / HSB

hsv(66.3, 60%, 100%)

CMYK

cmyk(6.3%, 0%, 60%, 0%)

LAB

lab(96.34, -24.76, 69.27)

LCH

lch(96.34, 73.56, 109.67)

OKLCH

oklch(96%, 0.1748, 114.76)

HWB

hwb(66.3, 40%, 0%)

Harmony colors

Complementary

#7666ff

Analogous

#ffc366

#efff66

#a2ff66

Triadic

#efff66

#66efff

#ff66ef

Split-complementary

#efff66

#66a2ff

#c366ff

Tetradic

#efff66

#66ff76

#7666ff

#ff66ef

Square

#efff66

#66ffc3

#7666ff

#ff66a2

Shades

Color #efff66 mixed toward black.

#e9ff2b

#d5ee00

#a0b300

#6b7700

#353b00

Tints

Color #efff66 mixed toward white.

#f2ff80

#f4ff99

#f7ffb3

#faffcc

#fcffe5

Tones

Color #efff66 mixed toward gray.

#e5f273

#dbe57f

#d1d98c

#c7cc99

#bdbfa6

Accessibility

Aa White text on this color

1.1:1

Aa Black text on this color

19.17:1

Black text reads better on this background (19.17:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#f6f69e · ΔE 8.2

Deuteranopia

#f5f4a8 · ΔE 10.2

Tritanopia

#f0bdc3 · ΔE 44.8

Achromatopsia

#f4f4f4 · ΔE 27.7

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #efff66;

Tailwind (arbitrary value)

bg-[#efff66]

Related colors

Ivory #fffff0

Beige #f5f5dc

Light Goldenrod Yellow #fafad2

Light Yellow #ffffe0

Olive #808000

Yellow #ffff00

Frequently asked questions

#efff66 (#efff66) is rgb(239, 255, 102) in RGB.

No, #efff66 is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #efff66, or check how it holds up for accessibility.

Generate a palette → Check contrast