#FFFF63#FFFF63

#FFFF63 is a very light, vivid yellow. Relative luminance 0.937; OKLCH L 97.2% C 0.174 H 109.2°. Best body text is #000000 at 19.74:1 contrast (WCAG AA passes).

Color values

HEX	#FFFF63
RGB	rgb(255, 255, 99)
HSL	hsl(60, 100%, 69%)
HSV	hsv(60, 61%, 100%)
CMYK	cmyk(0%, 0%, 61.2%, 0%)
CIE-LAB	lab(97.50, -18.63, 72.08)
CIE-LCH	lch(97.50, 74.45, 104.49°)
OKLab	oklab(97.21% -0.0572 0.1639)
OKLCH	oklch(97.21% 0.174 109.2)
XYZ	xyz(79.2546, 93.6831, 25.7097)
Luminance	0.9368 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFFF63 #6363FF

analogous

#FFB163 #FFFF63 #B1FF63

triadic

#FFFF63 #63FFFF #FF63FF

tetradic

#FFFF63 #63FFB1 #6363FF #FF63B1

square

#FFFF63 #63FFB1 #6363FF #FF63B1

split-complementary

#FFFF63 #63B1FF #B163FF

monochromatic

#E8E800 #FFFF26 #FFFF63 #FFFFA0 #FFFFDD

Accessibility & contrast

On white

1.06

#FFFF63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.74

#FFFF63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFFF63

19.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFFF63	#FFFFFF	#000000	##000000
##FFFF63	1.00	1.06	19.74	19.74
#FFFFFF	1.06	1.00	21.00	21.00
#000000	19.74	21.00	1.00	1.00
##000000	19.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF550

Deuteranopia (green-blind)

#FFFA6D

Tritanopia (blue-blind)

#FFF0DE

Achromatopsia (no color)

#F8F8F8

Design tokens & code

CSS

--color: #ffff63;
/* rgb */ color: rgb(255, 255, 99);
/* oklch */ color: oklch(97.2% 0.174 109.2);

Tailwind

colors: {
  custom: {
    50: '#ffff96',
    500: '#ffff63',
    950: '#000000',
  },
}

SCSS

$custom: #ffff63;
$custom-light: #ffff96;
$custom-dark: #000000;

JSON

{
  "hex": "#ffff63",
  "rgb": {
    "r": 255,
    "g": 255,
    "b": 99
  },
  "hsl": {
    "h": 60,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.97206,
    "c": 0.17357,
    "h": 109.2
  },
  "luminance": 0.93681
}

Semantic roles & 50–950 ramp

primary

#FFFF63

secondary

#2C2CDA

accent

#00E600

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#19170E

muted

#87857F

Preview Lab

Preview with #FFFF63

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

Preview Lab → · Contrast checker → · Palette generator →