#66B228#66B228

#66B228 is a light, vivid yellow-green. Relative luminance 0.348; OKLCH L 68.8% C 0.183 H 134.6°. Best body text is #000000 at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#66B228
RGB	rgb(102, 178, 40)
HSL	hsl(93, 63%, 43%)
HSV	hsv(93, 78%, 70%)
CMYK	cmyk(42.7%, 0%, 77.5%, 30.2%)
CIE-LAB	lab(65.61, -45.77, 58.43)
CIE-LCH	lch(65.61, 74.22, 128.08°)
OKLab	oklab(68.82% -0.1282 0.1299)
OKLCH	oklch(68.82% 0.183 134.6)
XYZ	xyz(21.7824, 34.8176, 7.5798)
Luminance	0.3482 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B228 #7428B2

analogous

#ABB228 #66B228 #28B22F

triadic

#66B228 #2866B2 #B22866

tetradic

#66B228 #28ABB2 #7428B2 #B22F28

square

#66B228 #28ABB2 #7428B2 #B22F28

split-complementary

#66B228 #2F28B2 #B228AB

monochromatic

#2D4E12 #49801D #66B228 #84D543 #A5E075

Accessibility & contrast

On white

2.64

#66B228 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.96

#66B228 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B228

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B228	#FFFFFF	#000000	##000000
##66B228	1.00	2.64	7.96	7.96
#FFFFFF	2.64	1.00	21.00	21.00
#000000	7.96	21.00	1.00	1.00
##000000	7.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A301

Deuteranopia (green-blind)

#AF9D37

Tritanopia (blue-blind)

#65AB98

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #66b228;
/* rgb */ color: rgb(102, 178, 40);
/* oklch */ color: oklch(68.8% 0.183 134.6);

Tailwind

colors: {
  custom: {
    50: '#98c96d',
    500: '#66b228',
    950: '#000000',
  },
}

SCSS

$custom: #66b228;
$custom-light: #98c96d;
$custom-dark: #000000;

JSON

{
  "hex": "#66b228",
  "rgb": {
    "r": 102,
    "g": 178,
    "b": 40
  },
  "hsl": {
    "h": 93.043,
    "s": 63.303,
    "l": 42.745
  },
  "oklch": {
    "l": 0.68822,
    "c": 0.18254,
    "h": 134.6
  },
  "luminance": 0.34819
}

Semantic roles & 50–950 ramp

primary

#66B228

secondary

#9F6FC7

accent

#41E69C

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1308

muted

#7E827B

Preview Lab

Preview with #66B228

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

Preview Lab → · Contrast checker → · Palette generator →