#66B428#66B428

#66B428 is a light, vivid yellow-green. Relative luminance 0.356; OKLCH L 69.3% C 0.185 H 134.8°. Best body text is #000000 at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#66B428
RGB	rgb(102, 180, 40)
HSL	hsl(93, 64%, 43%)
HSV	hsv(93, 78%, 71%)
CMYK	cmyk(43.3%, 0%, 77.8%, 29.4%)
CIE-LAB	lab(66.23, -46.59, 59.02)
CIE-LCH	lch(66.23, 75.19, 128.29°)
OKLab	oklab(69.33% -0.1304 0.1311)
OKLCH	oklch(69.33% 0.185 134.8)
XYZ	xyz(22.1833, 35.6192, 7.7134)
Luminance	0.3562 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B428 #7628B4

analogous

#ACB428 #66B428 #28B430

triadic

#66B428 #2866B4 #B42866

tetradic

#66B428 #28ACB4 #7628B4 #B43028

square

#66B428 #28ACB4 #7628B4 #B43028

split-complementary

#66B428 #3028B4 #B428AC

monochromatic

#2D5012 #4A821D #66B428 #84D544 #A5E176

Accessibility & contrast

On white

2.58

#66B428 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.12

#66B428 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B428

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B428	#FFFFFF	#000000	##000000
##66B428	1.00	2.58	8.12	8.12
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.12	21.00	1.00	1.00
##000000	8.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BBA500

Deuteranopia (green-blind)

#B09F37

Tritanopia (blue-blind)

#64AD9A

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66b428;
/* rgb */ color: rgb(102, 180, 40);
/* oklch */ color: oklch(69.3% 0.185 134.8);

Tailwind

colors: {
  custom: {
    50: '#98cb6d',
    500: '#66b428',
    950: '#000000',
  },
}

SCSS

$custom: #66b428;
$custom-light: #98cb6d;
$custom-dark: #000000;

JSON

{
  "hex": "#66b428",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 40
  },
  "hsl": {
    "h": 93.429,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.69332,
    "c": 0.18496,
    "h": 134.8
  },
  "luminance": 0.3562
}

Semantic roles & 50–950 ramp

primary

#66B428

secondary

#A170C8

accent

#41E79D

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1308

muted

#7E827B

Preview Lab

Preview with #66B428

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

Preview Lab → · Contrast checker → · Palette generator →