#EFFF64#EFFF64

#EFFF64 is a very light, vivid yellow. Relative luminance 0.908; OKLCH L 96.0% C 0.176 H 114.8°. Best body text is #000000 at 19.16:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF64
RGB	rgb(239, 255, 100)
HSL	hsl(66, 100%, 70%)
HSV	hsv(66, 61%, 100%)
CMYK	cmyk(6.3%, 0%, 60.8%, 0%)
CIE-LAB	lab(96.32, -24.89, 70.06)
CIE-LCH	lch(96.32, 74.35, 109.56°)
OKLab	oklab(95.97% -0.0738 0.1601)
OKLCH	oklch(95.97% 0.176 114.8)
XYZ	xyz(73.6585, 90.7920, 25.6985)
Luminance	0.9079 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF64 #7464FF

analogous

#FFC264 #EFFF64 #A1FF64

triadic

#EFFF64 #64EFFF #FF64EF

tetradic

#EFFF64 #64FFC2 #7464FF #FF64A1

square

#EFFF64 #64FFC2 #7464FF #FF64A1

split-complementary

#EFFF64 #64A1FF #C264FF

monochromatic

#D1E900 #E9FF27 #EFFF64 #F5FFA1 #FCFFDE

Accessibility & contrast

On white

1.10

#EFFF64 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.16

#EFFF64 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF64

19.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF64	#FFFFFF	#000000	##000000
##EFFF64	1.00	1.10	19.16	19.16
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.16	21.00	1.00	1.00
##000000	19.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF351

Deuteranopia (green-blind)

#FFF66E

Tritanopia (blue-blind)

#FDF1DF

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #efff64;
/* rgb */ color: rgb(239, 255, 100);
/* oklch */ color: oklch(96.0% 0.176 114.8);

Tailwind

colors: {
  custom: {
    50: '#f7ff96',
    500: '#efff64',
    950: '#000000',
  },
}

SCSS

$custom: #efff64;
$custom-light: #f7ff96;
$custom-dark: #000000;

JSON

{
  "hex": "#efff64",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 100
  },
  "hsl": {
    "h": 66.194,
    "s": 100,
    "l": 69.608
  },
  "oklch": {
    "l": 0.95973,
    "c": 0.1763,
    "h": 114.8
  },
  "luminance": 0.90791
}

Semantic roles & 50–950 ramp

primary

#EFFF64

secondary

#3F2DDA

accent

#00E618

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFF64

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

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