#666E8A#666E8A

#666E8A is a mid, muted blue. Relative luminance 0.158; OKLCH L 54.2% C 0.045 H 272.4°. Best body text is #FFFFFF at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#666E8A
RGB	rgb(102, 110, 138)
HSL	hsl(227, 15%, 47%)
HSV	hsv(227, 26%, 54%)
CMYK	cmyk(26.1%, 20.3%, 0%, 45.9%)
CIE-LAB	lab(46.73, 3.63, -16.36)
CIE-LCH	lch(46.73, 16.75, 282.52°)
OKLab	oklab(54.2% 0.0019 -0.0449)
OKLCH	oklch(54.2% 0.045 272.4)
XYZ	xyz(15.6417, 15.8112, 26.2676)
Luminance	0.1581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666E8A #8A8266

analogous

#66808A #666E8A #70668A

triadic

#666E8A #8A666E #6E8A66

tetradic

#666E8A #8A6680 #8A8266 #668A70

square

#666E8A #8A6680 #8A8266 #668A70

split-complementary

#666E8A #8A7066 #808A66

monochromatic

#323644 #4C5267 #666E8A #878EA6 #AAAFC0

Accessibility & contrast

On white

5.05

#666E8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#666E8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666E8A

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666E8A	#FFFFFF	#000000	##FFFFFF
##666E8A	1.00	5.05	4.16	5.05
#FFFFFF	5.05	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#66708B

Deuteranopia (green-blind)

#636D89

Tritanopia (blue-blind)

#5D7377

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #666e8a;
/* rgb */ color: rgb(102, 110, 138);
/* oklch */ color: oklch(54.2% 0.045 272.4);

Tailwind

colors: {
  custom: {
    50: '#9297ac',
    500: '#666e8a',
    950: '#000000',
  },
}

SCSS

$custom: #666e8a;
$custom-light: #9297ac;
$custom-dark: #000000;

JSON

{
  "hex": "#666e8a",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 138
  },
  "hsl": {
    "h": 226.667,
    "s": 15,
    "l": 47.059
  },
  "oklch": {
    "l": 0.54201,
    "c": 0.04491,
    "h": 272.4
  },
  "luminance": 0.15812
}

Semantic roles & 50–950 ramp

primary

#666E8A

secondary

#AFAB9D

accent

#A870B8

background

#F9F9FA

surface

#F1F2F4

border

#CBCCCE

text

#0D0D10

muted

#7E7E7F

Preview Lab

Preview with #666E8A

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

Preview Lab → · Contrast checker → · Palette generator →