#EFF66B#EFF66B

#EFF66B is a very light, vivid yellow. Relative luminance 0.853; OKLCH L 94.2% C 0.161 H 111.8°. Best body text is #000000 at 18.06:1 contrast (WCAG AA passes).

Color values

HEX	#EFF66B
RGB	rgb(239, 246, 107)
HSL	hsl(63, 89%, 69%)
HSV	hsv(63, 57%, 96%)
CMYK	cmyk(2.8%, 0%, 56.5%, 3.5%)
CIE-LAB	lab(94.02, -20.12, 64.63)
CIE-LCH	lch(94.02, 67.69, 107.29°)
OKLab	oklab(94.15% -0.0597 0.1494)
OKLCH	oklch(94.15% 0.161 111.8)
XYZ	xyz(71.2080, 85.3253, 26.6254)
Luminance	0.8532 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF66B #726BF6

analogous

#F6B86B #EFF66B #A9F66B

triadic

#EFF66B #6BEFF6 #F66BEF

tetradic

#EFF66B #6BF6B8 #726BF6 #F66BA9

square

#EFF66B #6BF6B8 #726BF6 #F66BA9

split-complementary

#EFF66B #6BA9F6 #B86BF6

monochromatic

#CFD90D #E9F231 #EFF66B #F5FAA5 #FBFDDE

Accessibility & contrast

On white

1.16

#EFF66B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.06

#EFF66B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF66B

18.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF66B	#FFFFFF	#000000	##000000
##EFF66B	1.00	1.16	18.06	18.06
#FFFFFF	1.16	1.00	21.00	21.00
#000000	18.06	21.00	1.00	1.00
##000000	18.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC5C

Deuteranopia (green-blind)

#FFF073

Tritanopia (blue-blind)

#FEE9D8

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #eff66b;
/* rgb */ color: rgb(239, 246, 107);
/* oklch */ color: oklch(94.2% 0.161 111.8);

Tailwind

colors: {
  custom: {
    50: '#f7f99a',
    500: '#eff66b',
    950: '#000000',
  },
}

SCSS

$custom: #eff66b;
$custom-light: #f7f99a;
$custom-dark: #000000;

JSON

{
  "hex": "#eff66b",
  "rgb": {
    "r": 239,
    "g": 246,
    "b": 107
  },
  "hsl": {
    "h": 63.022,
    "s": 88.535,
    "l": 69.216
  },
  "oklch": {
    "l": 0.94151,
    "c": 0.16089,
    "h": 111.8
  },
  "luminance": 0.85324
}

Semantic roles & 50–950 ramp

primary

#EFF66B

secondary

#3D36D0

accent

#00E50C

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFF66B

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

Preview Lab → · Contrast checker → · Palette generator →