#EFEF66#EFEF66

#EFEF66 is a very light, vivid yellow. Relative luminance 0.810; OKLCH L 92.6% C 0.158 H 109.1°. Best body text is #000000 at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#EFEF66
RGB	rgb(239, 239, 102)
HSL	hsl(60, 81%, 67%)
HSV	hsv(60, 57%, 94%)
CMYK	cmyk(0%, 0%, 57.3%, 6.3%)
CIE-LAB	lab(92.15, -17.09, 64.68)
CIE-LCH	lch(92.15, 66.90, 104.80°)
OKLab	oklab(92.64% -0.0516 0.1489)
OKLCH	oklch(92.64% 0.158 109.1)
XYZ	xyz(68.8634, 81.0449, 24.5835)
Luminance	0.8104 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFEF66 #6666EF

analogous

#EFAB66 #EFEF66 #ABEF66

triadic

#EFEF66 #66EFEF #EF66EF

tetradic

#EFEF66 #66EFAB #6666EF #EF66AB

square

#EFEF66 #66EFAB #6666EF #EF66AB

split-complementary

#EFEF66 #66ABEF #AB66EF

monochromatic

#C6C615 #E9E92F #EFEF66 #F5F59D #FBFBD5

Accessibility & contrast

On white

1.22

#EFEF66 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.21

#EFEF66 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFEF66

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFEF66	#FFFFFF	#000000	##000000
##EFEF66	1.00	1.22	17.21	17.21
#FFFFFF	1.22	1.00	21.00	21.00
#000000	17.21	21.00	1.00	1.00
##000000	17.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE657

Deuteranopia (green-blind)

#FFEB6E

Tritanopia (blue-blind)

#FEE1D2

Achromatopsia (no color)

#E8E8E8

Design tokens & code

CSS

--color: #efef66;
/* rgb */ color: rgb(239, 239, 102);
/* oklch */ color: oklch(92.6% 0.158 109.1);

Tailwind

colors: {
  custom: {
    50: '#f7f496',
    500: '#efef66',
    950: '#000000',
  },
}

SCSS

$custom: #efef66;
$custom-light: #f7f496;
$custom-dark: #000000;

JSON

{
  "hex": "#efef66",
  "rgb": {
    "r": 239,
    "g": 239,
    "b": 102
  },
  "hsl": {
    "h": 60,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.92643,
    "c": 0.15763,
    "h": 109.1
  },
  "luminance": 0.81043
}

Semantic roles & 50–950 ramp

primary

#EFEF66

secondary

#3636C3

accent

#08DD08

background

#FFFFFC

surface

#FFFEF5

border

#D7D6CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFEF66

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →