#666A64#666A64

#666A64 is a mid, near-neutral grey. Relative luminance 0.141; OKLCH L 51.9% C 0.010 H 134.9°. Best body text is #FFFFFF at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#666A64
RGB	rgb(102, 106, 100)
HSL	hsl(100, 3%, 40%)
HSV	hsv(100, 6%, 42%)
CMYK	cmyk(3.8%, 0%, 5.7%, 58.4%)
CIE-LAB	lab(44.31, -2.78, 2.83)
CIE-LCH	lch(44.31, 3.97, 134.45°)
OKLab	oklab(51.89% -0.0074 0.0074)
OKLCH	oklch(51.89% 0.01 134.9)
XYZ	xyz(12.9334, 14.0529, 14.0852)
Luminance	0.1405 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666A64 #68646A

analogous

#696A64 #666A64 #646A65

triadic

#666A64 #64666A #6A6466

tetradic

#666A64 #64696A #68646A #6A6564

square

#666A64 #64696A #68646A #6A6564

split-complementary

#666A64 #65646A #6A6469

monochromatic

#292B29 #484B46 #666A64 #848982 #A3A7A2

Accessibility & contrast

On white

5.51

#666A64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.81

#666A64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666A64

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666A64	#FFFFFF	#000000	##FFFFFF
##666A64	1.00	5.51	3.81	5.51
#FFFFFF	5.51	1.00	21.00	1.00
#000000	3.81	21.00	1.00	21.00
##FFFFFF	5.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B6964

Deuteranopia (green-blind)

#6A6964

Tritanopia (blue-blind)

#666968

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #666a64;
/* rgb */ color: rgb(102, 106, 100);
/* oklch */ color: oklch(51.9% 0.010 134.9);

Tailwind

colors: {
  custom: {
    50: '#919490',
    500: '#666a64',
    950: '#000000',
  },
}

SCSS

$custom: #666a64;
$custom-light: #919490;
$custom-dark: #000000;

JSON

{
  "hex": "#666a64",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 100
  },
  "hsl": {
    "h": 100,
    "s": 2.913,
    "l": 40.392
  },
  "oklch": {
    "l": 0.51888,
    "c": 0.01048,
    "h": 134.9
  },
  "luminance": 0.14053
}

Semantic roles & 50–950 ramp

primary

#666A64

secondary

#969397

accent

#7CAC9C

background

#F8F9F8

surface

#F0F1F0

border

#CBCBCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666A64

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

Preview Lab → · Contrast checker → · Palette generator →