#66D540#66D540

#66D540 is a light, highly saturated green. Relative luminance 0.508; OKLCH L 77.9% C 0.211 H 138.9°. Best body text is #000000 at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#66D540
RGB	rgb(102, 213, 64)
HSL	hsl(105, 64%, 54%)
HSV	hsv(105, 70%, 84%)
CMYK	cmyk(52.1%, 0%, 70%, 16.5%)
CIE-LAB	lab(76.55, -57.73, 60.93)
CIE-LCH	lch(76.55, 83.93, 133.45°)
OKLab	oklab(77.86% -0.159 0.1385)
OKLCH	oklch(77.86% 0.211 138.9)
XYZ	xyz(30.1980, 50.7811, 13.0599)
Luminance	0.5078 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D540 #AF40D5

analogous

#B1D540 #66D540 #40D565

triadic

#66D540 #4066D5 #D54066

tetradic

#66D540 #40B1D5 #AF40D5 #D56540

square

#66D540 #40B1D5 #AF40D5 #D56540

split-complementary

#66D540 #6540D5 #D540B1

monochromatic

#357F1C #4AB127 #66D540 #8EE072 #B6EBA4

Accessibility & contrast

On white

1.88

#66D540 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.16

#66D540 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D540

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D540	#FFFFFF	#000000	##000000
##66D540	1.00	1.88	11.16	11.16
#FFFFFF	1.88	1.00	21.00	21.00
#000000	11.16	21.00	1.00	1.00
##000000	11.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DBC328

Deuteranopia (green-blind)

#CDB94E

Tritanopia (blue-blind)

#5CCEB7

Achromatopsia (no color)

#BDBDBD

Design tokens & code

CSS

--color: #66d540;
/* rgb */ color: rgb(102, 213, 64);
/* oklch */ color: oklch(77.9% 0.211 138.9);

Tailwind

colors: {
  custom: {
    50: '#9ce37d',
    500: '#66d540',
    950: '#000000',
  },
}

SCSS

$custom: #66d540;
$custom-light: #9ce37d;
$custom-dark: #000000;

JSON

{
  "hex": "#66d540",
  "rgb": {
    "r": 102,
    "g": 213,
    "b": 64
  },
  "hsl": {
    "h": 104.698,
    "s": 63.948,
    "l": 54.314
  },
  "oklch": {
    "l": 0.7786,
    "c": 0.21082,
    "h": 138.9
  },
  "luminance": 0.50783
}

Semantic roles & 50–950 ramp

primary

#66D540

secondary

#713386

accent

#41E7BD

background

#FCFEFB

surface

#F6FCF2

border

#D0D5CC

text

#0F150A

muted

#80847D

Preview Lab

Preview with #66D540

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

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