#666C8A#666C8A

#666C8A is a mid, muted blue. Relative luminance 0.154; OKLCH L 53.8% C 0.048 H 275.9°. Best body text is #FFFFFF at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#666C8A
RGB	rgb(102, 108, 138)
HSL	hsl(230, 15%, 47%)
HSV	hsv(230, 26%, 54%)
CMYK	cmyk(26.1%, 21.7%, 0%, 45.9%)
CIE-LAB	lab(46.16, 4.83, -17.23)
CIE-LCH	lch(46.16, 17.89, 285.67°)
OKLab	oklab(53.76% 0.0049 -0.0473)
OKLCH	oklch(53.76% 0.048 275.9)
XYZ	xyz(15.4283, 15.3845, 26.1965)
Luminance	0.1538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C8A #8A8466

analogous

#667E8A #666C8A #72668A

triadic

#666C8A #8A666C #6C8A66

tetradic

#666C8A #8A667E #8A8466 #668A72

square

#666C8A #8A667E #8A8466 #668A72

split-complementary

#666C8A #8A7266 #7E8A66

monochromatic

#323544 #4C5067 #666C8A #878CA6 #AAAEC0

Accessibility & contrast

On white

5.15

#666C8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.08

#666C8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C8A

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C8A	#FFFFFF	#000000	##FFFFFF
##666C8A	1.00	5.15	4.08	5.15
#FFFFFF	5.15	1.00	21.00	1.00
#000000	4.08	21.00	1.00	21.00
##FFFFFF	5.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#636F8B

Deuteranopia (green-blind)

#616C89

Tritanopia (blue-blind)

#5D7176

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #666c8a;
/* rgb */ color: rgb(102, 108, 138);
/* oklch */ color: oklch(53.8% 0.048 275.9);

Tailwind

colors: {
  custom: {
    50: '#9296ac',
    500: '#666c8a',
    950: '#000000',
  },
}

SCSS

$custom: #666c8a;
$custom-light: #9296ac;
$custom-dark: #000000;

JSON

{
  "hex": "#666c8a",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 138
  },
  "hsl": {
    "h": 230,
    "s": 15,
    "l": 47.059
  },
  "oklch": {
    "l": 0.53757,
    "c": 0.04756,
    "h": 275.9
  },
  "luminance": 0.15385
}

Semantic roles & 50–950 ramp

primary

#666C8A

secondary

#AFAC9D

accent

#AC70B8

background

#F9F9FA

surface

#F1F1F4

border

#CBCBCE

text

#0D0D10

muted

#7E7E7F

Preview Lab

Preview with #666C8A

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

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