#EFFB64#EFFB64

#EFFB64 is a very light, vivid yellow. Relative luminance 0.883; OKLCH L 95.1% C 0.172 H 113.5°. Best body text is #000000 at 18.65:1 contrast (WCAG AA passes).

Color values

HEX	#EFFB64
RGB	rgb(239, 251, 100)
HSL	hsl(65, 95%, 69%)
HSV	hsv(65, 60%, 98%)
CMYK	cmyk(4.8%, 0%, 60.2%, 1.6%)
CIE-LAB	lab(95.27, -23.00, 68.93)
CIE-LCH	lch(95.27, 72.67, 108.45°)
OKLab	oklab(95.13% -0.0685 0.1577)
OKLCH	oklch(95.13% 0.172 113.5)
XYZ	xyz(72.3958, 88.2665, 25.2776)
Luminance	0.8827 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFB64 #7064FB

analogous

#FBBC64 #EFFB64 #A4FB64

triadic

#EFFB64 #64EFFB #FB64EF

tetradic

#EFFB64 #64FBBC #7064FB #FB64A4

square

#EFFB64 #64FBBC #7064FB #FB64A4

split-complementary

#EFFB64 #64A4FB #BC64FB

monochromatic

#CEDF06 #E9F928 #EFFB64 #F5FDA0 #FBFEDB

Accessibility & contrast

On white

1.13

#EFFB64 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.65

#EFFB64 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB64

18.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFB64	#FFFFFF	#000000	##000000
##EFFB64	1.00	1.13	18.65	18.65
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.65	21.00	1.00	1.00
##000000	18.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF052

Deuteranopia (green-blind)

#FFF36E

Tritanopia (blue-blind)

#FEEDDB

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #effb64;
/* rgb */ color: rgb(239, 251, 100);
/* oklch */ color: oklch(95.1% 0.172 113.5);

Tailwind

colors: {
  custom: {
    50: '#f7fc96',
    500: '#effb64',
    950: '#000000',
  },
}

SCSS

$custom: #effb64;
$custom-light: #f7fc96;
$custom-dark: #000000;

JSON

{
  "hex": "#effb64",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 100
  },
  "hsl": {
    "h": 64.768,
    "s": 94.969,
    "l": 68.824
  },
  "oklch": {
    "l": 0.95131,
    "c": 0.17193,
    "h": 113.5
  },
  "luminance": 0.88265
}

Semantic roles & 50–950 ramp

primary

#EFFB64

secondary

#3B2ED5

accent

#00E612

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFB64

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

Preview Lab → · Contrast checker → · Palette generator →