#66D42C#66D42C

#66D42C is a light, highly saturated yellow-green. Relative luminance 0.501; OKLCH L 77.5% C 0.220 H 137.6°. Best body text is #000000 at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#66D42C
RGB	rgb(102, 212, 44)
HSL	hsl(99, 66%, 50%)
HSV	hsv(99, 79%, 83%)
CMYK	cmyk(51.9%, 0%, 79.2%, 16.9%)
CIE-LAB	lab(76.13, -58.65, 67.13)
CIE-LCH	lch(76.13, 89.14, 131.14°)
OKLab	oklab(77.48% -0.1626 0.1487)
OKLCH	oklch(77.48% 0.22 137.6)
XYZ	xyz(29.4766, 50.0914, 10.4977)
Luminance	0.5009 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D42C #9A2CD4

analogous

#BAD42C #66D42C #2CD446

triadic

#66D42C #2C66D4 #D42C66

tetradic

#66D42C #2CBAD4 #9A2CD4 #D4462C

square

#66D42C #2CBAD4 #9A2CD4 #D4462C

split-complementary

#66D42C #462CD4 #D42CBA

monochromatic

#356F17 #4DA221 #66D42C #8BDE5F #B0E992

Accessibility & contrast

On white

1.91

#66D42C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.02

#66D42C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D42C

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D42C	#FFFFFF	#000000	##000000
##66D42C	1.00	1.91	11.02	11.02
#FFFFFF	1.91	1.00	21.00	21.00
#000000	11.02	21.00	1.00	1.00
##000000	11.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DBC100

Deuteranopia (green-blind)

#CDB840

Tritanopia (blue-blind)

#5ECCB5

Achromatopsia (no color)

#BCBCBC

Design tokens & code

CSS

--color: #66d42c;
/* rgb */ color: rgb(102, 212, 44);
/* oklch */ color: oklch(77.5% 0.220 137.6);

Tailwind

colors: {
  custom: {
    50: '#9ce273',
    500: '#66d42c',
    950: '#000000',
  },
}

SCSS

$custom: #66d42c;
$custom-light: #9ce273;
$custom-dark: #000000;

JSON

{
  "hex": "#66d42c",
  "rgb": {
    "r": 102,
    "g": 212,
    "b": 44
  },
  "hsl": {
    "h": 99.286,
    "s": 66.142,
    "l": 50.196
  },
  "oklch": {
    "l": 0.77477,
    "c": 0.22036,
    "h": 137.6
  },
  "luminance": 0.50094
}

Semantic roles & 50–950 ramp

primary

#66D42C

secondary

#5E2C78

accent

#3FE9AE

background

#FCFEFB

surface

#F6FCF1

border

#D0D5CB

text

#0F1509

muted

#80847D

Preview Lab

Preview with #66D42C

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

Preview Lab → · Contrast checker → · Palette generator →