#66C728#66C728

#66C728 is a light, highly saturated yellow-green. Relative luminance 0.438; OKLCH L 74.2% C 0.207 H 136.5°. Best body text is #000000 at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#66C728
RGB	rgb(102, 199, 40)
HSL	hsl(97, 67%, 47%)
HSV	hsv(97, 80%, 78%)
CMYK	cmyk(48.7%, 0%, 79.9%, 22%)
CIE-LAB	lab(72.11, -54.03, 64.53)
CIE-LCH	lch(72.11, 84.16, 129.94°)
OKLab	oklab(74.16% -0.1504 0.1427)
OKLCH	oklch(74.16% 0.207 136.5)
XYZ	xyz(26.2852, 43.8230, 9.0807)
Luminance	0.4382 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C728 #8928C7

analogous

#B6C728 #66C728 #28C73A

triadic

#66C728 #2866C7 #C72866

tetradic

#66C728 #28B6C7 #8928C7 #C73A28

square

#66C728 #28B6C7 #8928C7 #C73A28

split-complementary

#66C728 #3A28C7 #C728B6

monochromatic

#326114 #4C941E #66C728 #87DC50 #AAE683

Accessibility & contrast

On white

2.15

#66C728 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.76

#66C728 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C728

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C728	#FFFFFF	#000000	##000000
##66C728	1.00	2.15	9.76	9.76
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.76	21.00	1.00	1.00
##000000	9.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CEB600

Deuteranopia (green-blind)

#C1AE3B

Tritanopia (blue-blind)

#61C0AA

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66c728;
/* rgb */ color: rgb(102, 199, 40);
/* oklch */ color: oklch(74.2% 0.207 136.5);

Tailwind

colors: {
  custom: {
    50: '#9bd970',
    500: '#66c728',
    950: '#000000',
  },
}

SCSS

$custom: #66c728;
$custom-light: #9bd970;
$custom-dark: #000000;

JSON

{
  "hex": "#66c728",
  "rgb": {
    "r": 102,
    "g": 199,
    "b": 40
  },
  "hsl": {
    "h": 96.604,
    "s": 66.527,
    "l": 46.863
  },
  "oklch": {
    "l": 0.74164,
    "c": 0.20735,
    "h": 136.5
  },
  "luminance": 0.43825
}

Semantic roles & 50–950 ramp

primary

#66C728

secondary

#AF7CCF

accent

#3EE9A7

background

#FAFDF7

surface

#F4FAED

border

#CED3C8

text

#0F1508

muted

#7F837B

Preview Lab

Preview with #66C728

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

Preview Lab → · Contrast checker → · Palette generator →