#F0FF40#F0FF40

#F0FF40 is a very light, vivid yellow. Relative luminance 0.904; OKLCH L 95.8% C 0.199 H 114.2°. Best body text is #000000 at 19.08:1 contrast (WCAG AA passes).

Color values

HEX	#F0FF40
RGB	rgb(240, 255, 64)
HSL	hsl(65, 100%, 63%)
HSV	hsv(65, 75%, 100%)
CMYK	cmyk(5.9%, 0%, 74.9%, 0%)
CIE-LAB	lab(96.17, -26.39, 82.67)
CIE-LCH	lch(96.17, 86.78, 107.70°)
OKLab	oklab(95.79% -0.0813 0.1812)
OKLCH	oklch(95.79% 0.199 114.2)
XYZ	xyz(72.6228, 90.4169, 18.4761)
Luminance	0.9042 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#F0FF40 #4F40FF

analogous

#FFAE40 #F0FF40 #91FF40

triadic

#F0FF40 #40F0FF #FF40F0

tetradic

#F0FF40 #40FFAE #4F40FF #FF4091

square

#F0FF40 #40FFAE #4F40FF #FF4091

split-complementary

#F0FF40 #4091FF #AE40FF

monochromatic

#B5C500 #EBFF03 #F0FF40 #F5FF7D #FAFFBA

Accessibility & contrast

On white

1.10

#F0FF40 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.08

#F0FF40 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #F0FF40

19.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##F0FF40	#FFFFFF	#000000	##000000
##F0FF40	1.00	1.10	19.08	19.08
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.08	21.00	1.00	1.00
##000000	19.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF208

Deuteranopia (green-blind)

#FFF651

Tritanopia (blue-blind)

#FFF0DB

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #f0ff40;
/* rgb */ color: rgb(240, 255, 64);
/* oklch */ color: oklch(95.8% 0.199 114.2);

Tailwind

colors: {
  custom: {
    50: '#f9ff83',
    500: '#f0ff40',
    950: '#000000',
  },
}

SCSS

$custom: #f0ff40;
$custom-light: #f9ff83;
$custom-dark: #000000;

JSON

{
  "hex": "#f0ff40",
  "rgb": {
    "r": 240,
    "g": 255,
    "b": 64
  },
  "hsl": {
    "h": 64.712,
    "s": 100,
    "l": 62.549
  },
  "oklch": {
    "l": 0.95794,
    "c": 0.19858,
    "h": 114.2
  },
  "luminance": 0.90415
}

Semantic roles & 50–950 ramp

primary

#F0FF40

secondary

#2F22C1

accent

#00E612

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170C

muted

#86857F

Preview Lab

Preview with #F0FF40

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

Preview Lab → · Contrast checker → · Palette generator →