#EFF66F#EFF66F

#EFF66F is a very light, vivid yellow. Relative luminance 0.854; OKLCH L 94.2% C 0.158 H 111.8°. Best body text is #000000 at 18.08:1 contrast (WCAG AA passes).

Color values

HEX	#EFF66F
RGB	rgb(239, 246, 111)
HSL	hsl(63, 88%, 70%)
HSV	hsv(63, 55%, 96%)
CMYK	cmyk(2.8%, 0%, 54.9%, 3.5%)
CIE-LAB	lab(94.06, -19.82, 62.94)
CIE-LCH	lch(94.06, 65.99, 107.48°)
OKLab	oklab(94.19% -0.0584 0.1463)
OKLCH	oklch(94.19% 0.158 111.8)
XYZ	xyz(71.4233, 85.4114, 27.7595)
Luminance	0.8541 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF66F #766FF6

analogous

#F6B96F #EFF66F #ACF66F

triadic

#EFF66F #6FEFF6 #F66FEF

tetradic

#EFF66F #6FF6B9 #766FF6 #F66FAC

square

#EFF66F #6FF6B9 #766FF6 #F66FAC

split-complementary

#EFF66F #6FACF6 #B96FF6

monochromatic

#D2DD0E #E9F235 #EFF66F #F5FAA9 #FCFDE2

Accessibility & contrast

On white

1.16

#EFF66F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.08

#EFF66F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF66F

18.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF66F	#FFFFFF	#000000	##000000
##EFF66F	1.00	1.16	18.08	18.08
#FFFFFF	1.16	1.00	21.00	21.00
#000000	18.08	21.00	1.00	1.00
##000000	18.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC61

Deuteranopia (green-blind)

#FFF077

Tritanopia (blue-blind)

#FDE9D8

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #eff66f;
/* rgb */ color: rgb(239, 246, 111);
/* oklch */ color: oklch(94.2% 0.158 111.8);

Tailwind

colors: {
  custom: {
    50: '#f7f99c',
    500: '#eff66f',
    950: '#000000',
  },
}

SCSS

$custom: #eff66f;
$custom-light: #f7f99c;
$custom-dark: #000000;

JSON

{
  "hex": "#eff66f",
  "rgb": {
    "r": 239,
    "g": 246,
    "b": 111
  },
  "hsl": {
    "h": 63.111,
    "s": 88.235,
    "l": 70
  },
  "oklch": {
    "l": 0.94193,
    "c": 0.1575,
    "h": 111.8
  },
  "luminance": 0.8541
}

Semantic roles & 50–950 ramp

primary

#EFF66F

secondary

#4139D0

accent

#01E50D

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170F

muted

#858580

Preview Lab

Preview with #EFF66F

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

Preview Lab → · Contrast checker → · Palette generator →