#66B021#66B021

#66B021 is a light, vivid yellow-green. Relative luminance 0.340; OKLCH L 68.3% C 0.183 H 134.0°. Best body text is #000000 at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#66B021
RGB	rgb(102, 176, 33)
HSL	hsl(91, 68%, 41%)
HSV	hsv(91, 81%, 69%)
CMYK	cmyk(42%, 0%, 81.3%, 31%)
CIE-LAB	lab(64.95, -45.32, 59.92)
CIE-LCH	lch(64.95, 75.13, 127.10°)
OKLab	oklab(68.27% -0.1275 0.132)
OKLCH	oklch(68.27% 0.183 134)
XYZ	xyz(21.2790, 33.9841, 6.8769)
Luminance	0.3398 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B021 #6B21B0

analogous

#ADB021 #66B021 #21B023

triadic

#66B021 #2166B0 #B02166

tetradic

#66B021 #21ADB0 #6B21B0 #B02321

square

#66B021 #21ADB0 #6B21B0 #B02321

split-complementary

#66B021 #2321B0 #B021AD

monochromatic

#2A490E #487C17 #66B021 #84D935 #A4E369

Accessibility & contrast

On white

2.69

#66B021 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.80

#66B021 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B021

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B021	#FFFFFF	#000000	##000000
##66B021	1.00	2.69	7.80	7.80
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.80	21.00	1.00	1.00
##000000	7.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7A100

Deuteranopia (green-blind)

#AD9B32

Tritanopia (blue-blind)

#65A996

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #66b021;
/* rgb */ color: rgb(102, 176, 33);
/* oklch */ color: oklch(68.3% 0.183 134.0);

Tailwind

colors: {
  custom: {
    50: '#98c86a',
    500: '#66b021',
    950: '#000000',
  },
}

SCSS

$custom: #66b021;
$custom-light: #98c86a;
$custom-dark: #000000;

JSON

{
  "hex": "#66b021",
  "rgb": {
    "r": 102,
    "g": 176,
    "b": 33
  },
  "hsl": {
    "h": 91.049,
    "s": 68.421,
    "l": 40.98
  },
  "oklch": {
    "l": 0.68273,
    "c": 0.18348,
    "h": 134
  },
  "luminance": 0.33985
}

Semantic roles & 50–950 ramp

primary

#66B021

secondary

#9864C8

accent

#3DEB97

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1307

muted

#7E827A

Preview Lab

Preview with #66B021

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

Preview Lab → · Contrast checker → · Palette generator →