#666C80#666C80

#666C80 is a mid, muted blue. Relative luminance 0.151; OKLCH L 53.3% C 0.032 H 272.1°. Best body text is #FFFFFF at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#666C80
RGB	rgb(102, 108, 128)
HSL	hsl(226, 11%, 45%)
HSV	hsv(226, 20%, 50%)
CMYK	cmyk(20.3%, 15.6%, 0%, 49.8%)
CIE-LAB	lab(45.78, 2.31, -11.82)
CIE-LCH	lch(45.78, 12.05, 281.07°)
OKLab	oklab(53.34% 0.0012 -0.0322)
OKLCH	oklch(53.34% 0.032 272.1)
XYZ	xyz(14.7374, 15.1081, 22.5576)
Luminance	0.1511 (WCAG relative)
Temperature	neutral
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C80 #807A66

analogous

#667980 #666C80 #6D6680

triadic

#666C80 #80666C #6C8066

tetradic

#666C80 #806679 #807A66 #66806D

square

#666C80 #806679 #807A66 #66806D

split-complementary

#666C80 #806D66 #798066

monochromatic

#30333C #4B4F5E #666C80 #858B9E #A7ABB9

Accessibility & contrast

On white

5.22

#666C80 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#666C80 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C80

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C80	#FFFFFF	#000000	##FFFFFF
##666C80	1.00	5.22	4.02	5.22
#FFFFFF	5.22	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#666E81

Deuteranopia (green-blind)

#646B7F

Tritanopia (blue-blind)

#607073

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #666c80;
/* rgb */ color: rgb(102, 108, 128);
/* oklch */ color: oklch(53.3% 0.032 272.1);

Tailwind

colors: {
  custom: {
    50: '#9296a4',
    500: '#666c80',
    950: '#000000',
  },
}

SCSS

$custom: #666c80;
$custom-light: #9296a4;
$custom-dark: #000000;

JSON

{
  "hex": "#666c80",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 128
  },
  "hsl": {
    "h": 226.154,
    "s": 11.304,
    "l": 45.098
  },
  "oklch": {
    "l": 0.5334,
    "c": 0.0322,
    "h": 272.1
  },
  "luminance": 0.15108
}

Semantic roles & 50–950 ramp

primary

#666C80

secondary

#A8A599

accent

#A574B4

background

#F8F9FA

surface

#F0F1F4

border

#CBCBCE

text

#0D0D0F

muted

#7D7E7F

Preview Lab

Preview with #666C80

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

Preview Lab → · Contrast checker → · Palette generator →