#66D538#66D538

#66D538 is a light, highly saturated green. Relative luminance 0.507; OKLCH L 77.8% C 0.216 H 138.3°. Best body text is #000000 at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#66D538
RGB	rgb(102, 213, 56)
HSL	hsl(102, 65%, 53%)
HSV	hsv(102, 74%, 84%)
CMYK	cmyk(52.1%, 0%, 73.7%, 16.5%)
CIE-LAB	lab(76.49, -58.30, 63.73)
CIE-LCH	lch(76.49, 86.37, 132.45°)
OKLab	oklab(77.8% -0.161 0.1433)
OKLCH	oklch(77.8% 0.216 138.3)
XYZ	xyz(29.9865, 50.6965, 11.9459)
Luminance	0.5070 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D538 #A738D5

analogous

#B5D538 #66D538 #38D558

triadic

#66D538 #3866D5 #D53866

tetradic

#66D538 #38B5D5 #A738D5 #D55838

square

#66D538 #38B5D5 #A738D5 #D55838

split-complementary

#66D538 #5838D5 #D538B5

monochromatic

#36791A #4CAC24 #66D538 #8DE06B #B4EA9D

Accessibility & contrast

On white

1.89

#66D538 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.14

#66D538 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D538

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D538	#FFFFFF	#000000	##000000
##66D538	1.00	1.89	11.14	11.14
#FFFFFF	1.89	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)

#DCC218

Deuteranopia (green-blind)

#CDB948

Tritanopia (blue-blind)

#5DCEB7

Achromatopsia (no color)

#BDBDBD

Design tokens & code

CSS

--color: #66d538;
/* rgb */ color: rgb(102, 213, 56);
/* oklch */ color: oklch(77.8% 0.216 138.3);

Tailwind

colors: {
  custom: {
    50: '#9ce379',
    500: '#66d538',
    950: '#000000',
  },
}

SCSS

$custom: #66d538;
$custom-light: #9ce379;
$custom-dark: #000000;

JSON

{
  "hex": "#66d538",
  "rgb": {
    "r": 102,
    "g": 213,
    "b": 56
  },
  "hsl": {
    "h": 102.42,
    "s": 65.145,
    "l": 52.745
  },
  "oklch": {
    "l": 0.77801,
    "c": 0.21552,
    "h": 138.3
  },
  "luminance": 0.50699
}

Semantic roles & 50–950 ramp

primary

#66D538

secondary

#693081

accent

#40E8B7

background

#FCFEFB

surface

#F6FCF2

border

#D0D5CC

text

#0F150A

muted

#80847D

Preview Lab

Preview with #66D538

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

Preview Lab → · Contrast checker → · Palette generator →