#EFFC64#EFFC64

#EFFC64 is a very light, vivid yellow. Relative luminance 0.889; OKLCH L 95.3% C 0.173 H 113.8°. Best body text is #000000 at 18.78:1 contrast (WCAG AA passes).

Color values

HEX	#EFFC64
RGB	rgb(239, 252, 100)
HSL	hsl(65, 96%, 69%)
HSV	hsv(65, 60%, 99%)
CMYK	cmyk(5.2%, 0%, 60.3%, 1.2%)
CIE-LAB	lab(95.54, -23.47, 69.21)
CIE-LCH	lch(95.54, 73.09, 108.73°)
OKLab	oklab(95.34% -0.0698 0.1583)
OKLCH	oklch(95.34% 0.173 113.8)
XYZ	xyz(72.7090, 88.8930, 25.3820)
Luminance	0.8889 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFC64 #7164FC

analogous

#FCBD64 #EFFC64 #A3FC64

triadic

#EFFC64 #64EFFC #FC64EF

tetradic

#EFFC64 #64FCBD #7164FC #FC64A3

square

#EFFC64 #64FCBD #7164FC #FC64A3

split-complementary

#EFFC64 #64A3FC #BD64FC

monochromatic

#CEE104 #E9FB28 #EFFC64 #F5FDA0 #FBFEDC

Accessibility & contrast

On white

1.12

#EFFC64 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.78

#EFFC64 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFC64

18.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFC64	#FFFFFF	#000000	##000000
##EFFC64	1.00	1.12	18.78	18.78
#FFFFFF	1.12	1.00	21.00	21.00
#000000	18.78	21.00	1.00	1.00
##000000	18.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF152

Deuteranopia (green-blind)

#FFF46E

Tritanopia (blue-blind)

#FDEEDC

Achromatopsia (no color)

#F2F2F2

Design tokens & code

CSS

--color: #effc64;
/* rgb */ color: rgb(239, 252, 100);
/* oklch */ color: oklch(95.3% 0.173 113.8);

Tailwind

colors: {
  custom: {
    50: '#f7fd96',
    500: '#effc64',
    950: '#000000',
  },
}

SCSS

$custom: #effc64;
$custom-light: #f7fd96;
$custom-dark: #000000;

JSON

{
  "hex": "#effc64",
  "rgb": {
    "r": 239,
    "g": 252,
    "b": 100
  },
  "hsl": {
    "h": 65.132,
    "s": 96.203,
    "l": 69.02
  },
  "oklch": {
    "l": 0.95342,
    "c": 0.17302,
    "h": 113.8
  },
  "luminance": 0.88892
}

Semantic roles & 50–950 ramp

primary

#EFFC64

secondary

#3C2ED6

accent

#00E614

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFC64

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

Preview Lab → · Contrast checker → · Palette generator →