#66C536#66C536

#66C536 is a light, vivid yellow-green. Relative luminance 0.430; OKLCH L 73.7% C 0.198 H 137.3°. Best body text is #000000 at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#66C536
RGB	rgb(102, 197, 54)
HSL	hsl(100, 57%, 49%)
HSV	hsv(100, 73%, 77%)
CMYK	cmyk(48.2%, 0%, 72.6%, 22.7%)
CIE-LAB	lab(71.57, -52.42, 59.51)
CIE-LCH	lch(71.57, 79.30, 131.38°)
OKLab	oklab(73.74% -0.1453 0.1342)
OKLCH	oklch(73.74% 0.198 137.3)
XYZ	xyz(26.1108, 43.0218, 10.4175)
Luminance	0.4302 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C536 #9536C5

analogous

#AEC536 #66C536 #36C54E

triadic

#66C536 #3666C5 #C53666

tetradic

#66C536 #36AEC5 #9536C5 #C54E36

square

#66C536 #36AEC5 #9536C5 #C54E36

split-complementary

#66C536 #4E36C5 #C536AE

monochromatic

#34651C #4D9529 #66C536 #8AD464 #AEE294

Accessibility & contrast

On white

2.19

#66C536 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.60

#66C536 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C536

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C536	#FFFFFF	#000000	##000000
##66C536	1.00	2.19	9.60	9.60
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.60	21.00	1.00	1.00
##000000	9.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CBB41C

Deuteranopia (green-blind)

#BFAC44

Tritanopia (blue-blind)

#60BEA9

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #66c536;
/* rgb */ color: rgb(102, 197, 54);
/* oklch */ color: oklch(73.7% 0.198 137.3);

Tailwind

colors: {
  custom: {
    50: '#9ad776',
    500: '#66c536',
    950: '#000000',
  },
}

SCSS

$custom: #66c536;
$custom-light: #9ad776;
$custom-dark: #000000;

JSON

{
  "hex": "#66c536",
  "rgb": {
    "r": 102,
    "g": 197,
    "b": 54
  },
  "hsl": {
    "h": 99.86,
    "s": 56.972,
    "l": 49.216
  },
  "oklch": {
    "l": 0.73744,
    "c": 0.19775,
    "h": 137.3
  },
  "luminance": 0.43024
}

Semantic roles & 50–950 ramp

primary

#66C536

secondary

#B68ACD

accent

#48E0AD

background

#FAFDF7

surface

#F3FAED

border

#CDD3C8

text

#0F1409

muted

#7F837B

Preview Lab

Preview with #66C536

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

Preview Lab → · Contrast checker → · Palette generator →