#66A628#66A628

#66A628 is a light, vivid yellow-green. Relative luminance 0.302; OKLCH L 65.8% C 0.168 H 133.1°. Best body text is #000000 at 7.05:1 contrast (WCAG AA passes).

Color values

HEX	#66A628
RGB	rgb(102, 166, 40)
HSL	hsl(90, 61%, 40%)
HSV	hsv(90, 76%, 65%)
CMYK	cmyk(38.6%, 0%, 75.9%, 34.9%)
CIE-LAB	lab(61.87, -40.75, 54.84)
CIE-LCH	lch(61.87, 68.32, 126.62°)
OKLab	oklab(65.76% -0.1147 0.1224)
OKLCH	oklch(65.76% 0.168 133.1)
XYZ	xyz(19.4984, 30.2495, 6.8184)
Luminance	0.3025 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A628 #6828A6

analogous

#A5A628 #66A628 #28A629

triadic

#66A628 #2866A6 #A62866

tetradic

#66A628 #28A5A6 #6828A6 #A62928

square

#66A628 #28A5A6 #6828A6 #A62928

split-complementary

#66A628 #2928A6 #A628A5

monochromatic

#294310 #48751C #66A628 #84D03B #A3DC6D

Accessibility & contrast

On white

2.98

#66A628 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.05

#66A628 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A628

7.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A628	#FFFFFF	#000000	##000000
##66A628	1.00	2.98	7.05	7.05
#FFFFFF	2.98	1.00	21.00	21.00
#000000	7.05	21.00	1.00	1.00
##000000	7.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AD990B

Deuteranopia (green-blind)

#A49435

Tritanopia (blue-blind)

#669F8E

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #66a628;
/* rgb */ color: rgb(102, 166, 40);
/* oklch */ color: oklch(65.8% 0.168 133.1);

Tailwind

colors: {
  custom: {
    50: '#97c16b',
    500: '#66a628',
    950: '#000000',
  },
}

SCSS

$custom: #66a628;
$custom-light: #97c16b;
$custom-dark: #000000;

JSON

{
  "hex": "#66a628",
  "rgb": {
    "r": 102,
    "g": 166,
    "b": 40
  },
  "hsl": {
    "h": 90.476,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.65762,
    "c": 0.16773,
    "h": 133.1
  },
  "luminance": 0.3025
}

Semantic roles & 50–950 ramp

primary

#66A628

secondary

#9667C2

accent

#44E495

background

#F9FBF6

surface

#F2F7EC

border

#CCD0C7

text

#0E1207

muted

#7E817A

Preview Lab

Preview with #66A628

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

Preview Lab → · Contrast checker → · Palette generator →