#FFEF4B#FFEF4B

#FFEF4B is a very light, vivid yellow. Relative luminance 0.835; OKLCH L 93.8% C 0.175 H 103.7°. Best body text is #000000 at 17.70:1 contrast (WCAG AA passes).

Color values

HEX	#FFEF4B
RGB	rgb(255, 239, 75)
HSL	hsl(55, 100%, 65%)
HSV	hsv(55, 71%, 100%)
CMYK	cmyk(0%, 6.3%, 70.6%, 0%)
CIE-LAB	lab(93.23, -12.15, 76.75)
CIE-LCH	lch(93.23, 77.71, 99.00°)
OKLab	oklab(93.75% -0.0413 0.17)
OKLCH	oklch(93.75% 0.175 103.7)
XYZ	xyz(73.3796, 83.5040, 18.9079)
Luminance	0.8350 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFEF4B #4B5BFF

analogous

#FF954B #FFEF4B #B5FF4B

triadic

#FFEF4B #4BFFEF #EF4BFF

tetradic

#FFEF4B #4BFF95 #4B5BFF #FF4BB5

square

#FFEF4B #4BFF95 #4B5BFF #FF4BB5

split-complementary

#FFEF4B #4BB5FF #954BFF

monochromatic

#D0BD00 #FFEA0E #FFEF4B #FFF488 #FFFAC5

Accessibility & contrast

On white

1.19

#FFEF4B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.70

#FFEF4B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFEF4B

17.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFEF4B	#FFFFFF	#000000	##000000
##FFEF4B	1.00	1.19	17.70	17.70
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.70	21.00	1.00	1.00
##000000	17.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE72F

Deuteranopia (green-blind)

#FFEF56

Tritanopia (blue-blind)

#FFDFCF

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ffef4b;
/* rgb */ color: rgb(255, 239, 75);
/* oklch */ color: oklch(93.8% 0.175 103.7);

Tailwind

colors: {
  custom: {
    50: '#fff387',
    500: '#ffef4b',
    950: '#000000',
  },
}

SCSS

$custom: #ffef4b;
$custom-light: #fff387;
$custom-dark: #000000;

JSON

{
  "hex": "#ffef4b",
  "rgb": {
    "r": 255,
    "g": 239,
    "b": 75
  },
  "hsl": {
    "h": 54.667,
    "s": 100,
    "l": 64.706
  },
  "oklch": {
    "l": 0.93752,
    "c": 0.17496,
    "h": 103.7
  },
  "luminance": 0.83501
}

Semantic roles & 50–950 ramp

primary

#FFEF4B

secondary

#2433CA

accent

#14E600

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#19170C

muted

#87857F

Preview Lab

Preview with #FFEF4B

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

Preview Lab → · Contrast checker → · Palette generator →