#66B339#66B339

#66B339 is a light, vivid yellow-green. Relative luminance 0.354; OKLCH L 69.2% C 0.173 H 136.1°. Best body text is #000000 at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#66B339
RGB	rgb(102, 179, 57)
HSL	hsl(98, 52%, 46%)
HSV	hsv(98, 68%, 70%)
CMYK	cmyk(43%, 0%, 68.2%, 29.8%)
CIE-LAB	lab(66.03, -45.01, 52.66)
CIE-LCH	lch(66.03, 69.28, 130.52°)
OKLab	oklab(69.2% -0.125 0.1202)
OKLCH	oklch(69.2% 0.173 136.1)
XYZ	xyz(22.3375, 35.3591, 9.5181)
Luminance	0.3536 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B339 #8639B3

analogous

#A3B339 #66B339 #39B349

triadic

#66B339 #3966B3 #B33966

tetradic

#66B339 #39A3B3 #8639B3 #B34939

square

#66B339 #39A3B3 #8639B3 #B34939

split-complementary

#66B339 #4939B3 #B339A3

monochromatic

#31561B #4C852A #66B339 #86CC5E #A9DA8C

Accessibility & contrast

On white

2.60

#66B339 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.07

#66B339 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B339

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B339	#FFFFFF	#000000	##000000
##66B339	1.00	2.60	8.07	8.07
#FFFFFF	2.60	1.00	21.00	21.00
#000000	8.07	21.00	1.00	1.00
##000000	8.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A428

Deuteranopia (green-blind)

#AF9E44

Tritanopia (blue-blind)

#63AD9A

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b339;
/* rgb */ color: rgb(102, 179, 57);
/* oklch */ color: oklch(69.2% 0.173 136.1);

Tailwind

colors: {
  custom: {
    50: '#98ca76',
    500: '#66b339',
    950: '#000000',
  },
}

SCSS

$custom: #66b339;
$custom-light: #98ca76;
$custom-dark: #000000;

JSON

{
  "hex": "#66b339",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 57
  },
  "hsl": {
    "h": 97.869,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.69202,
    "c": 0.17344,
    "h": 136.1
  },
  "luminance": 0.3536
}

Semantic roles & 50–950 ramp

primary

#66B339

secondary

#AD83C5

accent

#4DDBA7

background

#F9FCF7

surface

#F2F8ED

border

#CCD1C8

text

#0E1309

muted

#7E827B

Preview Lab

Preview with #66B339

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

Preview Lab → · Contrast checker → · Palette generator →