#66BF38#66BF38

#66BF38 is a light, vivid yellow-green. Relative luminance 0.404; OKLCH L 72.2% C 0.189 H 137.0°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#66BF38
RGB	rgb(102, 191, 56)
HSL	hsl(100, 55%, 48%)
HSV	hsv(100, 71%, 75%)
CMYK	cmyk(46.6%, 0%, 70.7%, 25.1%)
CIE-LAB	lab(69.73, -49.93, 56.91)
CIE-LCH	lch(69.73, 75.71, 131.26°)
OKLab	oklab(72.24% -0.1384 0.129)
OKLCH	oklch(72.24% 0.189 137)
XYZ	xyz(24.8234, 40.3703, 10.2248)
Luminance	0.4037 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BF38 #9138BF

analogous

#A9BF38 #66BF38 #38BF4E

triadic

#66BF38 #3866BF #BF3866

tetradic

#66BF38 #38A9BF #9138BF #BF4E38

square

#66BF38 #38A9BF #9138BF #BF4E38

split-complementary

#66BF38 #4E38BF #BF38A9

monochromatic

#33601C #4D902A #66BF38 #89D163 #ACDF92

Accessibility & contrast

On white

2.31

#66BF38 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.07

#66BF38 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BF38

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BF38	#FFFFFF	#000000	##000000
##66BF38	1.00	2.31	9.07	9.07
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.07	21.00	1.00	1.00
##000000	9.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C5AF22

Deuteranopia (green-blind)

#BAA845

Tritanopia (blue-blind)

#61B8A4

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #66bf38;
/* rgb */ color: rgb(102, 191, 56);
/* oklch */ color: oklch(72.2% 0.189 137.0);

Tailwind

colors: {
  custom: {
    50: '#99d376',
    500: '#66bf38',
    950: '#000000',
  },
}

SCSS

$custom: #66bf38;
$custom-light: #99d376;
$custom-dark: #000000;

JSON

{
  "hex": "#66bf38",
  "rgb": {
    "r": 102,
    "g": 191,
    "b": 56
  },
  "hsl": {
    "h": 99.556,
    "s": 54.656,
    "l": 48.431
  },
  "oklch": {
    "l": 0.72239,
    "c": 0.18921,
    "h": 137
  },
  "luminance": 0.40372
}

Semantic roles & 50–950 ramp

primary

#66BF38

secondary

#B489CA

accent

#4ADEAC

background

#F9FDF7

surface

#F2FAED

border

#CCD3C8

text

#0F1409

muted

#7E837B

Preview Lab

Preview with #66BF38

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

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