#666366#666366

#666366 is a mid, near-neutral grey. Relative luminance 0.127; OKLCH L 50.3% C 0.006 H 325.7°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#666366
RGB	rgb(102, 99, 102)
HSL	hsl(300, 1%, 39%)
HSV	hsv(300, 3%, 40%)
CMYK	cmyk(0%, 2.9%, 0%, 60%)
CIE-LAB	lab(42.32, 1.80, -1.28)
CIE-LCH	lch(42.32, 2.20, 324.59°)
OKLab	oklab(50.34% 0.0049 -0.0034)
OKLCH	oklch(50.34% 0.006 325.7)
XYZ	xyz(12.3392, 12.7078, 14.3706)
Luminance	0.1271 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666366 #636663

analogous

#656366 #666366 #666365

triadic

#666366 #666663 #636666

tetradic

#666366 #666563 #636663 #636566

square

#666366 #666563 #636663 #636566

split-complementary

#666366 #656663 #636665

monochromatic

#282728 #474547 #666366 #858185 #A3A0A3

Accessibility & contrast

On white

5.93

#666366 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#666366 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666366

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666366	#FFFFFF	#000000	##FFFFFF
##666366	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#636466

Deuteranopia (green-blind)

#636466

Tritanopia (blue-blind)

#666364

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #666366;
/* rgb */ color: rgb(102, 99, 102);
/* oklch */ color: oklch(50.3% 0.006 325.7);

Tailwind

colors: {
  custom: {
    50: '#918f91',
    500: '#666366',
    950: '#000000',
  },
}

SCSS

$custom: #666366;
$custom-light: #918f91;
$custom-dark: #000000;

JSON

{
  "hex": "#666366",
  "rgb": {
    "r": 102,
    "g": 99,
    "b": 102
  },
  "hsl": {
    "h": 300,
    "s": 1.493,
    "l": 39.412
  },
  "oklch": {
    "l": 0.50343,
    "c": 0.00598,
    "h": 325.7
  },
  "luminance": 0.12708
}

Semantic roles & 50–950 ramp

primary

#666366

secondary

#919491

accent

#AB7D7D

background

#F8F8F8

surface

#F0F0F0

border

#CBCBCB

text

#0C0C0C

muted

#7D7D7D

Preview Lab

Preview with #666366

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

Preview Lab → · Contrast checker → · Palette generator →