#66B028#66B028

#66B028 is a light, vivid yellow-green. Relative luminance 0.340; OKLCH L 68.3% C 0.180 H 134.4°. Best body text is #000000 at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#66B028
RGB	rgb(102, 176, 40)
HSL	hsl(93, 63%, 42%)
HSV	hsv(93, 77%, 69%)
CMYK	cmyk(42%, 0%, 77.3%, 31%)
CIE-LAB	lab(64.98, -44.95, 57.83)
CIE-LCH	lch(64.98, 73.25, 127.86°)
OKLab	oklab(68.31% -0.126 0.1286)
OKLCH	oklch(68.31% 0.18 134.4)
XYZ	xyz(21.3874, 34.0275, 7.4481)
Luminance	0.3403 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B028 #7228B0

analogous

#AAB028 #66B028 #28B02E

triadic

#66B028 #2866B0 #B02866

tetradic

#66B028 #28AAB0 #7228B0 #B02E28

square

#66B028 #28AAB0 #7228B0 #B02E28

split-complementary

#66B028 #2E28B0 #B028AA

monochromatic

#2C4C11 #497E1D #66B028 #84D441 #A4DF73

Accessibility & contrast

On white

2.69

#66B028 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.81

#66B028 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B028

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B028	#FFFFFF	#000000	##000000
##66B028	1.00	2.69	7.81	7.81
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.81	21.00	1.00	1.00
##000000	7.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7A103

Deuteranopia (green-blind)

#AD9C37

Tritanopia (blue-blind)

#65A997

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #66b028;
/* rgb */ color: rgb(102, 176, 40);
/* oklch */ color: oklch(68.3% 0.180 134.4);

Tailwind

colors: {
  custom: {
    50: '#98c86d',
    500: '#66b028',
    950: '#000000',
  },
}

SCSS

$custom: #66b028;
$custom-light: #98c86d;
$custom-dark: #000000;

JSON

{
  "hex": "#66b028",
  "rgb": {
    "r": 102,
    "g": 176,
    "b": 40
  },
  "hsl": {
    "h": 92.647,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.68312,
    "c": 0.1801,
    "h": 134.4
  },
  "luminance": 0.34029
}

Semantic roles & 50–950 ramp

primary

#66B028

secondary

#9E6DC6

accent

#42E69B

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1308

muted

#7E827B

Preview Lab

Preview with #66B028

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

Preview Lab → · Contrast checker → · Palette generator →