#666A5C#666A5C

#666A5C is a mid, muted grey. Relative luminance 0.139; OKLCH L 51.7% C 0.022 H 120.2°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#666A5C
RGB	rgb(102, 106, 92)
HSL	hsl(77, 7%, 39%)
HSV	hsv(77, 13%, 42%)
CMYK	cmyk(3.8%, 0%, 13.2%, 58.4%)
CIE-LAB	lab(44.10, -4.33, 7.34)
CIE-LCH	lch(44.10, 8.52, 120.54°)
OKLab	oklab(51.65% -0.0111 0.019)
OKLCH	oklch(51.65% 0.022 120.2)
XYZ	xyz(12.5650, 13.9056, 12.1452)
Luminance	0.1391 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666A5C #605C6A

analogous

#6A675C #666A5C #5F6A5C

triadic

#666A5C #5C666A #6A5C66

tetradic

#666A5C #5C6A67 #605C6A #6A5C5F

square

#666A5C #5C6A67 #605C6A #6A5C5F

split-complementary

#666A5C #5C5F6A #675C6A

monochromatic

#272823 #464940 #666A5C #858A79 #A3A799

Accessibility & contrast

On white

5.55

#666A5C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#666A5C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666A5C

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666A5C	#FFFFFF	#000000	##FFFFFF
##666A5C	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C685B

Deuteranopia (green-blind)

#6B685D

Tritanopia (blue-blind)

#676866

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666a5c;
/* rgb */ color: rgb(102, 106, 92);
/* oklch */ color: oklch(51.7% 0.022 120.2);

Tailwind

colors: {
  custom: {
    50: '#91948a',
    500: '#666a5c',
    950: '#000000',
  },
}

SCSS

$custom: #666a5c;
$custom-light: #91948a;
$custom-dark: #000000;

JSON

{
  "hex": "#666a5c",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 92
  },
  "hsl": {
    "h": 77.143,
    "s": 7.071,
    "l": 38.824
  },
  "oklch": {
    "l": 0.51651,
    "c": 0.02202,
    "h": 120.2
  },
  "luminance": 0.13906
}

Semantic roles & 50–950 ramp

primary

#666A5C

secondary

#8F8B96

accent

#78B088

background

#F8F9F8

surface

#F0F1F0

border

#CBCBCB

text

#0C0D0B

muted

#7D7E7C

Preview Lab

Preview with #666A5C

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

Preview Lab → · Contrast checker → · Palette generator →