#666C5E#666C5E

#666C5E is a mid, muted grey. Relative luminance 0.144; OKLCH L 52.2% C 0.023 H 126.1°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#666C5E
RGB	rgb(102, 108, 94)
HSL	hsl(86, 7%, 40%)
HSV	hsv(86, 13%, 42%)
CMYK	cmyk(5.6%, 0%, 13%, 57.6%)
CIE-LAB	lab(44.74, -5.12, 7.06)
CIE-LCH	lch(44.74, 8.72, 125.95°)
OKLab	oklab(52.18% -0.0134 0.0183)
OKLCH	oklch(52.18% 0.023 126.1)
XYZ	xyz(12.8621, 14.3580, 12.6813)
Luminance	0.1436 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C5E #645E6C

analogous

#6C6B5E #666C5E #5F6C5E

triadic

#666C5E #5E666C #6C5E66

tetradic

#666C5E #5E6C6B #645E6C #6C5E5F

square

#666C5E #5E6C6B #645E6C #6C5E5F

split-complementary

#666C5E #5E5F6C #6B5E6C

monochromatic

#282B25 #474B42 #666C5E #858C7B #A3A99C

Accessibility & contrast

On white

5.42

#666C5E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#666C5E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C5E

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C5E	#FFFFFF	#000000	##FFFFFF
##666C5E	1.00	5.42	3.87	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E6A5D

Deuteranopia (green-blind)

#6D6A5F

Tritanopia (blue-blind)

#676B68

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #666c5e;
/* rgb */ color: rgb(102, 108, 94);
/* oklch */ color: oklch(52.2% 0.023 126.1);

Tailwind

colors: {
  custom: {
    50: '#91968b',
    500: '#666c5e',
    950: '#000000',
  },
}

SCSS

$custom: #666c5e;
$custom-light: #91968b;
$custom-dark: #000000;

JSON

{
  "hex": "#666c5e",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 94
  },
  "hsl": {
    "h": 85.714,
    "s": 6.931,
    "l": 39.608
  },
  "oklch": {
    "l": 0.52178,
    "c": 0.02267,
    "h": 126.1
  },
  "luminance": 0.14358
}

Semantic roles & 50–950 ramp

primary

#666C5E

secondary

#928E98

accent

#78B090

background

#F8F9F8

surface

#F0F1F0

border

#CBCBCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666C5E

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

Preview Lab → · Contrast checker → · Palette generator →