#666C66#666C66

#666C66 is a mid, near-neutral grey. Relative luminance 0.145; OKLCH L 52.4% C 0.012 H 145.4°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#666C66
RGB	rgb(102, 108, 102)
HSL	hsl(120, 3%, 41%)
HSV	hsv(120, 6%, 42%)
CMYK	cmyk(5.6%, 0%, 5.6%, 57.6%)
CIE-LAB	lab(44.95, -3.54, 2.56)
CIE-LCH	lch(44.95, 4.37, 144.14°)
OKLab	oklab(52.42% -0.0097 0.0067)
OKLCH	oklch(52.42% 0.012 145.4)
XYZ	xyz(13.2399, 14.5091, 14.6708)
Luminance	0.1451 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C66 #6C666C

analogous

#696C66 #666C66 #666C69

triadic

#666C66 #66666C #6C6666

tetradic

#666C66 #66696C #6C666C #6C6966

square

#666C66 #66696C #6C666C #6C6966

split-complementary

#666C66 #69666C #6C6669

monochromatic

#2B2D2B #484D48 #666C66 #848B84 #A4A9A4

Accessibility & contrast

On white

5.38

#666C66 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#666C66 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C66

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C66	#FFFFFF	#000000	##FFFFFF
##666C66	1.00	5.38	3.90	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C6B66

Deuteranopia (green-blind)

#6B6A66

Tritanopia (blue-blind)

#666C6A

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #666c66;
/* rgb */ color: rgb(102, 108, 102);
/* oklch */ color: oklch(52.4% 0.012 145.4);

Tailwind

colors: {
  custom: {
    50: '#919691',
    500: '#666c66',
    950: '#000000',
  },
}

SCSS

$custom: #666c66;
$custom-light: #919691;
$custom-dark: #000000;

JSON

{
  "hex": "#666c66",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 102
  },
  "hsl": {
    "h": 120,
    "s": 2.857,
    "l": 41.176
  },
  "oklch": {
    "l": 0.52416,
    "c": 0.01181,
    "h": 145.4
  },
  "luminance": 0.14509
}

Semantic roles & 50–950 ramp

primary

#666C66

secondary

#999599

accent

#7CACAC

background

#F8F9F8

surface

#F0F1F0

border

#CBCBCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666C66

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

Preview Lab → · Contrast checker → · Palette generator →