#66C434#66C434

#66C434 is a light, vivid yellow-green. Relative luminance 0.426; OKLCH L 73.5% C 0.198 H 137.1°. Best body text is #000000 at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#66C434
RGB	rgb(102, 196, 52)
HSL	hsl(99, 58%, 49%)
HSV	hsv(99, 73%, 77%)
CMYK	cmyk(48%, 0%, 73.5%, 23.1%)
CIE-LAB	lab(71.25, -52.17, 59.90)
CIE-LCH	lch(71.25, 79.43, 131.06°)
OKLab	oklab(73.48% -0.1447 0.1347)
OKLCH	oklch(73.48% 0.198 137.1)
XYZ	xyz(25.8385, 42.5508, 10.0997)
Luminance	0.4255 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C434 #9234C4

analogous

#AEC434 #66C434 #34C44A

triadic

#66C434 #3466C4 #C43466

tetradic

#66C434 #34AEC4 #9234C4 #C44A34

square

#66C434 #34AEC4 #9234C4 #C44A34

split-complementary

#66C434 #4A34C4 #C434AE

monochromatic

#34631A #4D9427 #66C434 #89D560 #ADE291

Accessibility & contrast

On white

2.21

#66C434 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.51

#66C434 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C434

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C434	#FFFFFF	#000000	##000000
##66C434	1.00	2.21	9.51	9.51
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.51	21.00	1.00	1.00
##000000	9.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CBB318

Deuteranopia (green-blind)

#BEAC43

Tritanopia (blue-blind)

#61BDA8

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66c434;
/* rgb */ color: rgb(102, 196, 52);
/* oklch */ color: oklch(73.5% 0.198 137.1);

Tailwind

colors: {
  custom: {
    50: '#9ad675',
    500: '#66c434',
    950: '#000000',
  },
}

SCSS

$custom: #66c434;
$custom-light: #9ad675;
$custom-dark: #000000;

JSON

{
  "hex": "#66c434",
  "rgb": {
    "r": 102,
    "g": 196,
    "b": 52
  },
  "hsl": {
    "h": 99.167,
    "s": 58.065,
    "l": 48.627
  },
  "oklch": {
    "l": 0.73476,
    "c": 0.19771,
    "h": 137.1
  },
  "luminance": 0.42553
}

Semantic roles & 50–950 ramp

primary

#66C434

secondary

#B487CC

accent

#47E1AC

background

#FAFDF7

surface

#F3FAED

border

#CDD3C8

text

#0F1409

muted

#7F837B

Preview Lab

Preview with #66C434

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

Preview Lab → · Contrast checker → · Palette generator →