#66D539#66D539

#66D539 is a light, highly saturated green. Relative luminance 0.507; OKLCH L 77.8% C 0.215 H 138.4°. Best body text is #000000 at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#66D539
RGB	rgb(102, 213, 57)
HSL	hsl(103, 65%, 53%)
HSV	hsv(103, 73%, 84%)
CMYK	cmyk(52.1%, 0%, 73.2%, 16.5%)
CIE-LAB	lab(76.50, -58.24, 63.39)
CIE-LCH	lch(76.50, 86.08, 132.57°)
OKLab	oklab(77.81% -0.1608 0.1427)
OKLCH	oklch(77.81% 0.215 138.4)
XYZ	xyz(30.0112, 50.7064, 12.0760)
Luminance	0.5071 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D539 #A839D5

analogous

#B4D539 #66D539 #39D55A

triadic

#66D539 #3966D5 #D53966

tetradic

#66D539 #39B4D5 #A839D5 #D55A39

square

#66D539 #39B4D5 #A839D5 #D55A39

split-complementary

#66D539 #5A39D5 #D539B4

monochromatic

#367A1A #4CAC25 #66D539 #8DE06B #B4EA9E

Accessibility & contrast

On white

1.88

#66D539 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.14

#66D539 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D539

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D539	#FFFFFF	#000000	##000000
##66D539	1.00	1.88	11.14	11.14
#FFFFFF	1.88	1.00	21.00	21.00
#000000	11.14	21.00	1.00	1.00
##000000	11.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DCC21A

Deuteranopia (green-blind)

#CDB949

Tritanopia (blue-blind)

#5DCEB7

Achromatopsia (no color)

#BDBDBD

Design tokens & code

CSS

--color: #66d539;
/* rgb */ color: rgb(102, 213, 57);
/* oklch */ color: oklch(77.8% 0.215 138.4);

Tailwind

colors: {
  custom: {
    50: '#9ce379',
    500: '#66d539',
    950: '#000000',
  },
}

SCSS

$custom: #66d539;
$custom-light: #9ce379;
$custom-dark: #000000;

JSON

{
  "hex": "#66d539",
  "rgb": {
    "r": 102,
    "g": 213,
    "b": 57
  },
  "hsl": {
    "h": 102.692,
    "s": 65,
    "l": 52.941
  },
  "oklch": {
    "l": 0.77808,
    "c": 0.21497,
    "h": 138.4
  },
  "luminance": 0.50709
}

Semantic roles & 50–950 ramp

primary

#66D539

secondary

#6A3182

accent

#40E8B7

background

#FCFEFB

surface

#F6FCF2

border

#D0D5CC

text

#0F150A

muted

#80847D

Preview Lab

Preview with #66D539

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

Preview Lab → · Contrast checker → · Palette generator →