#EFEF63#EFEF63

#EFEF63 is a very light, vivid yellow. Relative luminance 0.810; OKLCH L 92.6% C 0.160 H 109.2°. Best body text is #000000 at 17.20:1 contrast (WCAG AA passes).

Color values

HEX	#EFEF63
RGB	rgb(239, 239, 99)
HSL	hsl(60, 81%, 66%)
HSV	hsv(60, 59%, 94%)
CMYK	cmyk(0%, 0%, 58.6%, 6.3%)
CIE-LAB	lab(92.13, -17.30, 65.92)
CIE-LCH	lch(92.13, 68.16, 104.70°)
OKLab	oklab(92.61% -0.0525 0.1512)
OKLCH	oklch(92.61% 0.16 109.2)
XYZ	xyz(68.7173, 80.9864, 23.8141)
Luminance	0.8098 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFEF63 #6363EF

analogous

#EFA963 #EFEF63 #A9EF63

triadic

#EFEF63 #63EFEF #EF63EF

tetradic

#EFEF63 #63EFA9 #6363EF #EF63A9

square

#EFEF63 #63EFA9 #6363EF #EF63A9

split-complementary

#EFEF63 #63A9EF #A963EF

monochromatic

#C4C414 #E9E92B #EFEF63 #F5F59B #FAFAD2

Accessibility & contrast

On white

1.22

#EFEF63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.20

#EFEF63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFEF63

17.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFEF63	#FFFFFF	#000000	##000000
##EFEF63	1.00	1.22	17.20	17.20
#FFFFFF	1.22	1.00	21.00	21.00
#000000	17.20	21.00	1.00	1.00
##000000	17.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE653

Deuteranopia (green-blind)

#FFEB6B

Tritanopia (blue-blind)

#FEE1D1

Achromatopsia (no color)

#E8E8E8

Design tokens & code

CSS

--color: #efef63;
/* rgb */ color: rgb(239, 239, 99);
/* oklch */ color: oklch(92.6% 0.160 109.2);

Tailwind

colors: {
  custom: {
    50: '#f7f495',
    500: '#efef63',
    950: '#000000',
  },
}

SCSS

$custom: #efef63;
$custom-light: #f7f495;
$custom-dark: #000000;

JSON

{
  "hex": "#efef63",
  "rgb": {
    "r": 239,
    "g": 239,
    "b": 99
  },
  "hsl": {
    "h": 60,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.92614,
    "c": 0.16006,
    "h": 109.2
  },
  "luminance": 0.80985
}

Semantic roles & 50–950 ramp

primary

#EFEF63

secondary

#3535C1

accent

#08DE08

background

#FFFFFC

surface

#FFFEF5

border

#D7D6CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFEF63

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

Preview Lab → · Contrast checker → · Palette generator →