#66B628#66B628

#66B628 is a light, vivid yellow-green. Relative luminance 0.364; OKLCH L 69.8% C 0.187 H 135.1°. Best body text is #000000 at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#66B628
RGB	rgb(102, 182, 40)
HSL	hsl(94, 64%, 44%)
HSV	hsv(94, 78%, 71%)
CMYK	cmyk(44%, 0%, 78%, 28.6%)
CIE-LAB	lab(66.85, -47.39, 59.61)
CIE-LCH	lch(66.85, 76.15, 128.49°)
OKLab	oklab(69.84% -0.1326 0.1324)
OKLCH	oklch(69.84% 0.187 135.1)
XYZ	xyz(22.5899, 36.4326, 7.8489)
Luminance	0.3643 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B628 #7828B6

analogous

#ADB628 #66B628 #28B631

triadic

#66B628 #2866B6 #B62866

tetradic

#66B628 #28ADB6 #7828B6 #B63128

square

#66B628 #28ADB6 #7828B6 #B63128

split-complementary

#66B628 #3128B6 #B628AD

monochromatic

#2E5212 #4A841D #66B628 #84D645 #A5E177

Accessibility & contrast

On white

2.53

#66B628 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.29

#66B628 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B628

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B628	#FFFFFF	#000000	##000000
##66B628	1.00	2.53	8.29	8.29
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.29	21.00	1.00	1.00
##000000	8.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BDA700

Deuteranopia (green-blind)

#B2A038

Tritanopia (blue-blind)

#64AF9C

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #66b628;
/* rgb */ color: rgb(102, 182, 40);
/* oklch */ color: oklch(69.8% 0.187 135.1);

Tailwind

colors: {
  custom: {
    50: '#99cc6e',
    500: '#66b628',
    950: '#000000',
  },
}

SCSS

$custom: #66b628;
$custom-light: #99cc6e;
$custom-dark: #000000;

JSON

{
  "hex": "#66b628",
  "rgb": {
    "r": 102,
    "g": 182,
    "b": 40
  },
  "hsl": {
    "h": 93.803,
    "s": 63.964,
    "l": 43.529
  },
  "oklch": {
    "l": 0.69841,
    "c": 0.18737,
    "h": 135.1
  },
  "luminance": 0.36434
}

Semantic roles & 50–950 ramp

primary

#66B628

secondary

#A271C9

accent

#41E79E

background

#F9FCF6

surface

#F2F9EC

border

#CCD2C7

text

#0F1308

muted

#7E827B

Preview Lab

Preview with #66B628

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

Preview Lab → · Contrast checker → · Palette generator →