#666EB2#666EB2

#666EB2 is a mid, moderate blue. Relative luminance 0.172; OKLCH L 56.2% C 0.105 H 277.3°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#666EB2
RGB	rgb(102, 110, 178)
HSL	hsl(234, 33%, 55%)
HSV	hsv(234, 43%, 70%)
CMYK	cmyk(42.7%, 38.2%, 0%, 30.2%)
CIE-LAB	lab(48.50, 14.80, -37.13)
CIE-LCH	lch(48.50, 39.97, 291.73°)
OKLab	oklab(56.16% 0.0135 -0.1045)
OKLCH	oklch(56.16% 0.105 277.3)
XYZ	xyz(19.0889, 17.1901, 44.4231)
Luminance	0.1719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EB2 #B2AA66

analogous

#6694B2 #666EB2 #8466B2

triadic

#666EB2 #B2666E #6EB266

tetradic

#666EB2 #B26694 #B2AA66 #66B284

square

#666EB2 #B26694 #B2AA66 #66B284

split-complementary

#666EB2 #B28466 #94B266

monochromatic

#353A69 #495192 #666EB2 #8F95C6 #B7BBDB

Accessibility & contrast

On white

4.73

#666EB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#666EB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666EB2

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EB2	#FFFFFF	#000000	##FFFFFF
##666EB2	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5676B5

Deuteranopia (green-blind)

#5170B0

Tritanopia (blue-blind)

#4E7C87

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666eb2;
/* rgb */ color: rgb(102, 110, 178);
/* oklch */ color: oklch(56.2% 0.105 277.3);

Tailwind

colors: {
  custom: {
    50: '#9597c9',
    500: '#666eb2',
    950: '#000000',
  },
}

SCSS

$custom: #666eb2;
$custom-light: #9597c9;
$custom-dark: #000000;

JSON

{
  "hex": "#666eb2",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 178
  },
  "hsl": {
    "h": 233.684,
    "s": 33.043,
    "l": 54.902
  },
  "oklch": {
    "l": 0.56157,
    "c": 0.10534,
    "h": 277.3
  },
  "luminance": 0.17191
}

Semantic roles & 50–950 ramp

primary

#666EB2

secondary

#CAC7AA

accent

#BE5FC9

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666EB2

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

Preview Lab → · Contrast checker → · Palette generator →