#66B231#66B231

#66B231 is a light, vivid yellow-green. Relative luminance 0.349; OKLCH L 68.9% C 0.177 H 135.3°. Best body text is #000000 at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#66B231
RGB	rgb(102, 178, 49)
HSL	hsl(95, 57%, 45%)
HSV	hsv(95, 72%, 70%)
CMYK	cmyk(42.7%, 0%, 72.5%, 30.2%)
CIE-LAB	lab(65.66, -45.20, 55.38)
CIE-LCH	lch(65.66, 71.48, 129.22°)
OKLab	oklab(68.88% -0.1261 0.1248)
OKLCH	oklch(68.88% 0.177 135.3)
XYZ	xyz(21.9538, 34.8861, 8.4820)
Luminance	0.3489 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B231 #7D31B2

analogous

#A7B231 #66B231 #31B23D

triadic

#66B231 #3166B2 #B23166

tetradic

#66B231 #31A7B2 #7D31B2 #B23D31

square

#66B231 #31A7B2 #7D31B2 #B23D31

split-complementary

#66B231 #3D31B2 #B231A7

monochromatic

#2F5217 #4B8224 #66B231 #85CF51 #A7DC81

Accessibility & contrast

On white

2.63

#66B231 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.98

#66B231 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B231

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B231	#FFFFFF	#000000	##000000
##66B231	1.00	2.63	7.98	7.98
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.98	21.00	1.00	1.00
##000000	7.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A31A

Deuteranopia (green-blind)

#AE9D3D

Tritanopia (blue-blind)

#64AB99

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #66b231;
/* rgb */ color: rgb(102, 178, 49);
/* oklch */ color: oklch(68.9% 0.177 135.3);

Tailwind

colors: {
  custom: {
    50: '#98c971',
    500: '#66b231',
    950: '#000000',
  },
}

SCSS

$custom: #66b231;
$custom-light: #98c971;
$custom-dark: #000000;

JSON

{
  "hex": "#66b231",
  "rgb": {
    "r": 102,
    "g": 178,
    "b": 49
  },
  "hsl": {
    "h": 95.349,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.68883,
    "c": 0.17744,
    "h": 135.3
  },
  "luminance": 0.34887
}

Semantic roles & 50–950 ramp

primary

#66B231

secondary

#A679C5

accent

#48E0A1

background

#F9FCF7

surface

#F2F8ED

border

#CCD1C8

text

#0E1308

muted

#7E827B

Preview Lab

Preview with #66B231

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

Preview Lab → · Contrast checker → · Palette generator →