#FFFF66#FFFF66

#FFFF66 is a very light, vivid yellow. Relative luminance 0.937; OKLCH L 97.2% C 0.171 H 109.2°. Best body text is #000000 at 19.75:1 contrast (WCAG AA passes).

Color values

HEX	#FFFF66
RGB	rgb(255, 255, 102)
HSL	hsl(60, 100%, 70%)
HSV	hsv(60, 60%, 100%)
CMYK	cmyk(0%, 0%, 60%, 0%)
CIE-LAB	lab(97.53, -18.44, 70.90)
CIE-LCH	lch(97.53, 73.26, 104.58°)
OKLab	oklab(97.23% -0.0563 0.1618)
OKLCH	oklch(97.23% 0.171 109.2)
XYZ	xyz(79.4007, 93.7415, 26.4791)
Luminance	0.9374 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFFF66 #6666FF

analogous

#FFB366 #FFFF66 #B3FF66

triadic

#FFFF66 #66FFFF #FF66FF

tetradic

#FFFF66 #66FFB3 #6666FF #FF66B3

square

#FFFF66 #66FFB3 #6666FF #FF66B3

split-complementary

#FFFF66 #66B2FF #B266FF

monochromatic

#EBEB00 #FFFF29 #FFFF66 #FFFFA3 #FFFFE0

Accessibility & contrast

On white

1.06

#FFFF66 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.75

#FFFF66 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFFF66

19.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFFF66	#FFFFFF	#000000	##000000
##FFFF66	1.00	1.06	19.75	19.75
#FFFFFF	1.06	1.00	21.00	21.00
#000000	19.75	21.00	1.00	1.00
##000000	19.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF554

Deuteranopia (green-blind)

#FFFA6F

Tritanopia (blue-blind)

#FFF0DF

Achromatopsia (no color)

#F8F8F8

Design tokens & code

CSS

--color: #ffff66;
/* rgb */ color: rgb(255, 255, 102);
/* oklch */ color: oklch(97.2% 0.171 109.2);

Tailwind

colors: {
  custom: {
    50: '#ffff98',
    500: '#ffff66',
    950: '#000000',
  },
}

SCSS

$custom: #ffff66;
$custom-light: #ffff98;
$custom-dark: #000000;

JSON

{
  "hex": "#ffff66",
  "rgb": {
    "r": 255,
    "g": 255,
    "b": 102
  },
  "hsl": {
    "h": 60,
    "s": 100,
    "l": 70
  },
  "oklch": {
    "l": 0.97232,
    "c": 0.17132,
    "h": 109.2
  },
  "luminance": 0.93739
}

Semantic roles & 50–950 ramp

primary

#FFFF66

secondary

#2F2FDA

accent

#00E600

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#19170E

muted

#87857F

Preview Lab

Preview with #FFFF66

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

Preview Lab → · Contrast checker → · Palette generator →