#EFFF81#EFFF81

#EFFF81 is a very light, vivid yellow. Relative luminance 0.915; OKLCH L 96.3% C 0.151 H 115.3°. Best body text is #000000 at 19.29:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF81
RGB	rgb(239, 255, 129)
HSL	hsl(68, 100%, 75%)
HSV	hsv(68, 49%, 100%)
CMYK	cmyk(6.3%, 0%, 49.4%, 0%)
CIE-LAB	lab(96.60, -22.64, 57.85)
CIE-LCH	lch(96.60, 62.12, 111.37°)
OKLab	oklab(96.28% -0.0647 0.137)
OKLCH	oklch(96.28% 0.151 115.3)
XYZ	xyz(75.3202, 91.4567, 34.4497)
Luminance	0.9146 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF81 #9181FF

analogous

#FFD081 #EFFF81 #B0FF81

triadic

#EFFF81 #81EFFF #FF81EF

tetradic

#EFFF81 #81FFD0 #9181FF #FF81B0

square

#EFFF81 #81FFD0 #9181FF #FF81B0

split-complementary

#EFFF81 #81B0FF #D081FF

monochromatic

#DFFF07 #E7FF44 #EFFF81 #F7FFBE #FBFFE0

Accessibility & contrast

On white

1.09

#EFFF81 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.29

#EFFF81 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF81

19.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF81	#FFFFFF	#000000	##000000
##EFFF81	1.00	1.09	19.29	19.29
#FFFFFF	1.09	1.00	21.00	21.00
#000000	19.29	21.00	1.00	1.00
##000000	19.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF475

Deuteranopia (green-blind)

#FFF688

Tritanopia (blue-blind)

#FBF3E2

Achromatopsia (no color)

#F5F5F5

Design tokens & code

CSS

--color: #efff81;
/* rgb */ color: rgb(239, 255, 129);
/* oklch */ color: oklch(96.3% 0.151 115.3);

Tailwind

colors: {
  custom: {
    50: '#f6ffa8',
    500: '#efff81',
    950: '#000000',
  },
}

SCSS

$custom: #efff81;
$custom-light: #f6ffa8;
$custom-dark: #000000;

JSON

{
  "hex": "#efff81",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 129
  },
  "hsl": {
    "h": 67.619,
    "s": 100,
    "l": 75.294
  },
  "oklch": {
    "l": 0.9628,
    "c": 0.15147,
    "h": 115.3
  },
  "luminance": 0.91456
}

Semantic roles & 50–950 ramp

primary

#EFFF81

secondary

#5946DE

accent

#00E61D

background

#FFFFFD

surface

#FFFFF7

border

#D7D7D0

text

#171810

muted

#858681

Preview Lab

Preview with #EFFF81

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

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