#FFFF3F#FFFF3F

#FFFF3F is a very light, vivid yellow. Relative luminance 0.931; OKLCH L 97.0% C 0.195 H 109.6°. Best body text is #000000 at 19.63:1 contrast (WCAG AA passes).

Color values

HEX	#FFFF3F
RGB	rgb(255, 255, 63)
HSL	hsl(60, 100%, 62%)
HSV	hsv(60, 75%, 100%)
CMYK	cmyk(0%, 0%, 75.3%, 0%)
CIE-LAB	lab(97.28, -20.38, 84.39)
CIE-LCH	lch(97.28, 86.82, 103.58°)
OKLab	oklab(96.96% -0.0654 0.1842)
OKLCH	oklch(96.96% 0.195 109.6)
XYZ	xyz(77.9001, 93.1413, 18.5762)
Luminance	0.9314 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFFF3F #3F3FFF

analogous

#FF9F3F #FFFF3F #9FFF3F

triadic

#FFFF3F #3FFFFF #FF3FFF

tetradic

#FFFF3F #3FFF9F #3F3FFF #FF3F9F

square

#FFFF3F #3FFF9F #3F3FFF #FF3F9F

split-complementary

#FFFF3F #3F9FFF #9F3FFF

monochromatic

#C4C400 #FFFF02 #FFFF3F #FFFF7C #FFFFB9

Accessibility & contrast

On white

1.07

#FFFF3F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.63

#FFFF3F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFFF3F

19.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFFF3F	#FFFFFF	#000000	##000000
##FFFF3F	1.00	1.07	19.63	19.63
#FFFFFF	1.07	1.00	21.00	21.00
#000000	19.63	21.00	1.00	1.00
##000000	19.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF401

Deuteranopia (green-blind)

#FFFA50

Tritanopia (blue-blind)

#FFEFDB

Achromatopsia (no color)

#F7F7F7

Design tokens & code

CSS

--color: #ffff3f;
/* rgb */ color: rgb(255, 255, 63);
/* oklch */ color: oklch(97.0% 0.195 109.6);

Tailwind

colors: {
  custom: {
    50: '#ffff83',
    500: '#ffff3f',
    950: '#000000',
  },
}

SCSS

$custom: #ffff3f;
$custom-light: #ffff83;
$custom-dark: #000000;

JSON

{
  "hex": "#ffff3f",
  "rgb": {
    "r": 255,
    "g": 255,
    "b": 63
  },
  "hsl": {
    "h": 60,
    "s": 100,
    "l": 62.353
  },
  "oklch": {
    "l": 0.96961,
    "c": 0.19543,
    "h": 109.6
  },
  "luminance": 0.93139
}

Semantic roles & 50–950 ramp

primary

#FFFF3F

secondary

#2222C0

accent

#00E600

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#19170C

muted

#87857F

Preview Lab

Preview with #FFFF3F

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

Preview Lab → · Contrast checker → · Palette generator →