#666E8D#666E8D

#666E8D is a mid, muted blue. Relative luminance 0.159; OKLCH L 54.3% C 0.049 H 273.4°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX#666E8D
RGBrgb(102, 110, 141)
HSLhsl(228, 16%, 48%)
HSVhsv(228, 28%, 55%)
CMYKcmyk(27.7%, 22%, 0%, 44.7%)
CIE-LABlab(46.84, 4.41, -17.96)
CIE-LCHlch(46.84, 18.49, 283.79°)
OKLaboklab(54.33% 0.0029 -0.0494)
OKLCHoklch(54.33% 0.049 273.4)
XYZxyz(15.8619, 15.8993, 27.4273)
Luminance0.1590 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#666E8D #8D8566
analogous
#66818D #666E8D #71668D
triadic
#666E8D #8D666E #6E8D66
tetradic
#666E8D #8D6681 #8D8566 #668D71
square
#666E8D #8D6681 #8D8566 #668D71
split-complementary
#666E8D #8D7166 #818D66
monochromatic
#333746 #4C5269 #666E8D #888EA9 #ABB0C2

Accessibility & contrast

On white

5.02
#666E8D on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.18
#666E8D on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666E8D
5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##666E8D#FFFFFF#000000##FFFFFF
##666E8D1.005.024.185.02
#FFFFFF5.021.0021.001.00
#0000004.1821.001.0021.00
##FFFFFF5.021.0021.001.00

Color blindness preview

Protanopia (red-blind)
#65718E
Deuteranopia (green-blind)
#626E8C
Tritanopia (blue-blind)
#5C7478
Achromatopsia (no color)
#6F6F6F

Design tokens & code

CSS
--color: #666e8d;
/* rgb */ color: rgb(102, 110, 141);
/* oklch */ color: oklch(54.3% 0.049 273.4);
Tailwind
colors: {
  custom: {
    50: '#9297ae',
    500: '#666e8d',
    950: '#000000',
  },
}
SCSS
$custom: #666e8d;
$custom-light: #9297ae;
$custom-dark: #000000;
JSON
{
  "hex": "#666e8d",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 141
  },
  "hsl": {
    "h": 227.692,
    "s": 16.049,
    "l": 47.647
  },
  "oklch": {
    "l": 0.5433,
    "c": 0.04948,
    "h": 273.4
  },
  "luminance": 0.159
}

Semantic roles & 50–950 ramp

primary
#666E8D
secondary
#B1AD9E
accent
#AA6FB9
background
#F9F9FA
surface
#F1F2F4
border
#CBCCCE
text
#0D0D10
muted
#7E7E7F

Preview Lab

Preview with #666E8D

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

Preview Lab → · Contrast checker → · Palette generator →

#666E8D Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva