#F3FF00#F3FF00

#F3FF00 is a very light, highly saturated yellow. Relative luminance 0.906; OKLCH L 95.9% C 0.214 H 113.2°. Best body text is #000000 at 19.12:1 contrast (WCAG AA passes).

Color values

HEX	#F3FF00
RGB	rgb(243, 255, 0)
HSL	hsl(63, 100%, 50%)
HSV	hsv(63, 100%, 100%)
CMYK	cmyk(4.7%, 0%, 100%, 0%)
CIE-LAB	lab(96.24, -26.46, 93.41)
CIE-LCH	lch(96.24, 97.08, 105.81°)
OKLab	oklab(95.85% -0.0844 0.1968)
OKLCH	oklch(95.85% 0.214 113.2)
XYZ	xyz(72.7248, 90.5764, 13.6520)
Luminance	0.9058 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#F3FF00 #0C00FF

analogous

#FF8C00 #F3FF00 #73FF00

triadic

#F3FF00 #00F3FF #FF00F3

tetradic

#F3FF00 #00FF8C #0C00FF #FF0073

square

#F3FF00 #00FF8C #0C00FF #FF0073

split-complementary

#F3FF00 #0073FF #8C00FF

monochromatic

#7E8500 #B9C200 #F3FF00 #F6FF3D #F9FF7A

Accessibility & contrast

On white

1.10

#F3FF00 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.12

#F3FF00 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #F3FF00

19.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##F3FF00	#FFFFFF	#000000	##000000
##F3FF00	1.00	1.10	19.12	19.12
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.12	21.00	1.00	1.00
##000000	19.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF200

Deuteranopia (green-blind)

#FFF632

Tritanopia (blue-blind)

#FFEFD9

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #f3ff00;
/* rgb */ color: rgb(243, 255, 0);
/* oklch */ color: oklch(95.9% 0.214 113.2);

Tailwind

colors: {
  custom: {
    50: '#fcff73',
    500: '#f3ff00',
    950: '#000000',
  },
}

SCSS

$custom: #f3ff00;
$custom-light: #fcff73;
$custom-dark: #000000;

JSON

{
  "hex": "#f3ff00",
  "rgb": {
    "r": 243,
    "g": 255,
    "b": 0
  },
  "hsl": {
    "h": 62.824,
    "s": 100,
    "l": 50
  },
  "oklch": {
    "l": 0.95853,
    "c": 0.21409,
    "h": 113.2
  },
  "luminance": 0.90575
}

Semantic roles & 50–950 ramp

primary

#F3FF00

secondary

#1E188B

accent

#29FF33

background

#FFFFFB

surface

#FFFFF2

border

#D7D7CC

text

#19170A

muted

#87857D

Preview Lab

Preview with #F3FF00

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

Preview Lab → · Contrast checker → · Palette generator →