#66EC5B#66EC5B

#66EC5B is a very light, highly saturated green. Relative luminance 0.636; OKLCH L 83.9% C 0.220 H 142.1°. Best body text is #000000 at 13.71:1 contrast (WCAG AA passes).

Color values

HEX	#66EC5B
RGB	rgb(102, 236, 91)
HSL	hsl(115, 79%, 64%)
HSV	hsv(115, 61%, 93%)
CMYK	cmyk(56.8%, 0%, 61.4%, 7.5%)
CIE-LAB	lab(83.74, -63.65, 57.91)
CIE-LCH	lch(83.74, 86.05, 137.70°)
OKLab	oklab(83.86% -0.1735 0.1351)
OKLCH	oklch(83.86% 0.22 142.1)
XYZ	xyz(37.3614, 63.5677, 20.1964)
Luminance	0.6357 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66EC5B #E15BEC

analogous

#AFEC5B #66EC5B #5BEC99

triadic

#66EC5B #5B66EC #EC5B66

tetradic

#66EC5B #5BAFEC #E15BEC #EC995B

square

#66EC5B #5BAFEC #E15BEC #EC995B

split-complementary

#66EC5B #995BEC #EC5BAF

monochromatic

#22B715 #33E624 #66EC5B #99F292 #CCF9C9

Accessibility & contrast

On white

1.53

#66EC5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.71

#66EC5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66EC5B

13.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66EC5B	#FFFFFF	#000000	##000000
##66EC5B	1.00	1.53	13.71	13.71
#FFFFFF	1.53	1.00	21.00	21.00
#000000	13.71	21.00	1.00	1.00
##000000	13.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F1D84A

Deuteranopia (green-blind)

#E0CC67

Tritanopia (blue-blind)

#52E5CD

Achromatopsia (no color)

#D1D1D1

Design tokens & code

CSS

--color: #66ec5b;
/* rgb */ color: rgb(102, 236, 91);
/* oklch */ color: oklch(83.9% 0.220 142.1);

Tailwind

colors: {
  custom: {
    50: '#9ef38e',
    500: '#66ec5b',
    950: '#000000',
  },
}

SCSS

$custom: #66ec5b;
$custom-light: #9ef38e;
$custom-dark: #000000;

JSON

{
  "hex": "#66ec5b",
  "rgb": {
    "r": 102,
    "g": 236,
    "b": 91
  },
  "hsl": {
    "h": 115.448,
    "s": 79.235,
    "l": 64.118
  },
  "oklch": {
    "l": 0.83857,
    "c": 0.21986,
    "h": 142.1
  },
  "luminance": 0.63571
}

Semantic roles & 50–950 ramp

primary

#66EC5B

secondary

#AD34B7

accent

#0ADCCC

background

#FCFFFC

surface

#F6FEF4

border

#D0D6CE

text

#10170D

muted

#80857F

Preview Lab

Preview with #66EC5B

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

Preview Lab → · Contrast checker → · Palette generator →