#66BD38#66BD38

#66BD38 is a light, vivid yellow-green. Relative luminance 0.395; OKLCH L 71.7% C 0.187 H 136.9°. Best body text is #000000 at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#66BD38
RGB	rgb(102, 189, 56)
HSL	hsl(99, 54%, 48%)
HSV	hsv(99, 70%, 74%)
CMYK	cmyk(46%, 0%, 70.4%, 25.9%)
CIE-LAB	lab(69.11, -49.14, 56.27)
CIE-LCH	lch(69.11, 74.71, 131.13°)
OKLab	oklab(71.73% -0.1363 0.1277)
OKLCH	oklch(71.73% 0.187 136.9)
XYZ	xyz(24.3902, 39.5039, 10.0804)
Luminance	0.3951 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BD38 #8F38BD

analogous

#A8BD38 #66BD38 #38BD4C

triadic

#66BD38 #3866BD #BD3866

tetradic

#66BD38 #38A8BD #8F38BD #BD4C38

square

#66BD38 #38A8BD #8F38BD #BD4C38

split-complementary

#66BD38 #4C38BD #BD38A8

monochromatic

#335F1C #4D8E2A #66BD38 #88D062 #ACDE91

Accessibility & contrast

On white

2.36

#66BD38 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.90

#66BD38 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BD38

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BD38	#FFFFFF	#000000	##000000
##66BD38	1.00	2.36	8.90	8.90
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.90	21.00	1.00	1.00
##000000	8.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3AD23

Deuteranopia (green-blind)

#B8A644

Tritanopia (blue-blind)

#61B6A3

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66bd38;
/* rgb */ color: rgb(102, 189, 56);
/* oklch */ color: oklch(71.7% 0.187 136.9);

Tailwind

colors: {
  custom: {
    50: '#99d176',
    500: '#66bd38',
    950: '#000000',
  },
}

SCSS

$custom: #66bd38;
$custom-light: #99d176;
$custom-dark: #000000;

JSON

{
  "hex": "#66bd38",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 56
  },
  "hsl": {
    "h": 99.248,
    "s": 54.286,
    "l": 48.039
  },
  "oklch": {
    "l": 0.71732,
    "c": 0.18674,
    "h": 136.9
  },
  "luminance": 0.39505
}

Semantic roles & 50–950 ramp

primary

#66BD38

secondary

#B387C9

accent

#4ADEAB

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1409

muted

#7E827B

Preview Lab

Preview with #66BD38

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

Preview Lab → · Contrast checker → · Palette generator →