#666FB2#666FB2

#666FB2 is a mid, moderate blue. Relative luminance 0.174; OKLCH L 56.4% C 0.104 H 276.7°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#666FB2
RGB	rgb(102, 111, 178)
HSL	hsl(233, 33%, 55%)
HSV	hsv(233, 43%, 70%)
CMYK	cmyk(42.7%, 37.6%, 0%, 30.2%)
CIE-LAB	lab(48.77, 14.19, -36.71)
CIE-LCH	lch(48.77, 39.35, 291.13°)
OKLab	oklab(56.36% 0.0122 -0.1032)
OKLCH	oklch(56.36% 0.104 276.7)
XYZ	xyz(19.1974, 17.4071, 44.4592)
Luminance	0.1741 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FB2 #B2A966

analogous

#6695B2 #666FB2 #8366B2

triadic

#666FB2 #B2666F #6FB266

tetradic

#666FB2 #B26695 #B2A966 #66B283

square

#666FB2 #B26695 #B2A966 #66B283

split-complementary

#666FB2 #B28366 #95B266

monochromatic

#353B69 #495292 #666FB2 #8F95C6 #B7BCDB

Accessibility & contrast

On white

4.69

#666FB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#666FB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FB2

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FB2	#FFFFFF	#000000	##FFFFFF
##666FB2	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5777B5

Deuteranopia (green-blind)

#5271B0

Tritanopia (blue-blind)

#4D7C88

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666fb2;
/* rgb */ color: rgb(102, 111, 178);
/* oklch */ color: oklch(56.4% 0.104 276.7);

Tailwind

colors: {
  custom: {
    50: '#9598c9',
    500: '#666fb2',
    950: '#000000',
  },
}

SCSS

$custom: #666fb2;
$custom-light: #9598c9;
$custom-dark: #000000;

JSON

{
  "hex": "#666fb2",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 178
  },
  "hsl": {
    "h": 232.895,
    "s": 33.043,
    "l": 54.902
  },
  "oklch": {
    "l": 0.56364,
    "c": 0.10395,
    "h": 276.7
  },
  "luminance": 0.17408
}

Semantic roles & 50–950 ramp

primary

#666FB2

secondary

#CAC6AA

accent

#BD5FC9

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666FB2

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

Preview Lab → · Contrast checker → · Palette generator →