#666C64#666C64

#666C64 is a mid, near-neutral grey. Relative luminance 0.145; OKLCH L 52.4% C 0.014 H 137.8°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#666C64
RGB	rgb(102, 108, 100)
HSL	hsl(105, 4%, 41%)
HSV	hsv(105, 7%, 42%)
CMYK	cmyk(5.6%, 0%, 7.4%, 57.6%)
CIE-LAB	lab(44.90, -3.95, 3.68)
CIE-LCH	lch(44.90, 5.40, 136.99°)
OKLab	oklab(52.35% -0.0106 0.0096)
OKLCH	oklch(52.35% 0.014 137.8)
XYZ	xyz(13.1419, 14.4699, 14.1547)
Luminance	0.1447 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C64 #6A646C

analogous

#6A6C64 #666C64 #646C66

triadic

#666C64 #64666C #6C6466

tetradic

#666C64 #646A6C #6A646C #6C6664

square

#666C64 #646A6C #6A646C #6C6664

split-complementary

#666C64 #66646C #6C646A

monochromatic

#2A2C29 #484C47 #666C64 #848B82 #A3A9A2

Accessibility & contrast

On white

5.39

#666C64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#666C64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C64

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C64	#FFFFFF	#000000	##FFFFFF
##666C64	1.00	5.39	3.89	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D6B64

Deuteranopia (green-blind)

#6C6A64

Tritanopia (blue-blind)

#666B6A

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #666c64;
/* rgb */ color: rgb(102, 108, 100);
/* oklch */ color: oklch(52.4% 0.014 137.8);

Tailwind

colors: {
  custom: {
    50: '#919690',
    500: '#666c64',
    950: '#000000',
  },
}

SCSS

$custom: #666c64;
$custom-light: #919690;
$custom-dark: #000000;

JSON

{
  "hex": "#666c64",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 100
  },
  "hsl": {
    "h": 105,
    "s": 3.846,
    "l": 40.784
  },
  "oklch": {
    "l": 0.52354,
    "c": 0.01434,
    "h": 137.8
  },
  "luminance": 0.1447
}

Semantic roles & 50–950 ramp

primary

#666C64

secondary

#979399

accent

#7BADA0

background

#F8F9F8

surface

#F0F1F0

border

#CBCBCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666C64

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

Preview Lab → · Contrast checker → · Palette generator →