#66B31A#66B31A

#66B31A is a light, vivid yellow-green. Relative luminance 0.351; OKLCH L 69.0% C 0.190 H 134.0°. Best body text is #000000 at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#66B31A
RGB	rgb(102, 179, 26)
HSL	hsl(90, 75%, 40%)
HSV	hsv(90, 85%, 70%)
CMYK	cmyk(43%, 0%, 85.5%, 29.8%)
CIE-LAB	lab(65.86, -46.83, 62.52)
CIE-LCH	lch(65.86, 78.12, 126.84°)
OKLab	oklab(69.01% -0.1319 0.1365)
OKLCH	oklch(69.01% 0.19 134)
XYZ	xyz(21.7856, 35.1383, 6.6115)
Luminance	0.3514 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B31A #671AB3

analogous

#B2B31A #66B31A #1AB31A

triadic

#66B31A #1A66B3 #B31A66

tetradic

#66B31A #1AB2B3 #671AB3 #B31A1A

square

#66B31A #1AB2B3 #671AB3 #B31A1A

split-complementary

#66B31A #1A1AB3 #B31AB2

monochromatic

#29480A #487E12 #66B31A #85E02A #A3E860

Accessibility & contrast

On white

2.62

#66B31A on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.03

#66B31A on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B31A

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B31A	#FFFFFF	#000000	##000000
##66B31A	1.00	2.62	8.03	8.03
#FFFFFF	2.62	1.00	21.00	21.00
#000000	8.03	21.00	1.00	1.00
##000000	8.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#B09E2E

Tritanopia (blue-blind)

#65AC98

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b31a;
/* rgb */ color: rgb(102, 179, 26);
/* oklch */ color: oklch(69.0% 0.190 134.0);

Tailwind

colors: {
  custom: {
    50: '#99ca68',
    500: '#66b31a',
    950: '#000000',
  },
}

SCSS

$custom: #66b31a;
$custom-light: #99ca68;
$custom-dark: #000000;

JSON

{
  "hex": "#66b31a",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 26
  },
  "hsl": {
    "h": 90.196,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.69007,
    "c": 0.18978,
    "h": 134
  },
  "luminance": 0.3514
}

Semantic roles & 50–950 ramp

primary

#66B31A

secondary

#955DCC

accent

#37F195

background

#F9FCF6

surface

#F2F8EB

border

#CCD1C6

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B31A

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

Preview Lab → · Contrast checker → · Palette generator →