#666CB2#666CB2

#666CB2 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.7% C 0.108 H 278.5°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#666CB2
RGB	rgb(102, 108, 178)
HSL	hsl(235, 33%, 55%)
HSV	hsv(235, 43%, 70%)
CMYK	cmyk(42.7%, 39.3%, 0%, 30.2%)
CIE-LAB	lab(47.96, 16.02, -37.98)
CIE-LCH	lch(47.96, 41.22, 292.87°)
OKLab	oklab(55.74% 0.0161 -0.107)
OKLCH	oklch(55.74% 0.108 278.5)
XYZ	xyz(18.8755, 16.7634, 44.3519)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CB2 #B2AC66

analogous

#6692B2 #666CB2 #8666B2

triadic

#666CB2 #B2666C #6CB266

tetradic

#666CB2 #B26692 #B2AC66 #66B286

square

#666CB2 #B26692 #B2AC66 #66B286

split-complementary

#666CB2 #B28666 #92B266

monochromatic

#353969 #494F92 #666CB2 #8F93C6 #B7BADB

Accessibility & contrast

On white

4.82

#666CB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#666CB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CB2

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CB2	#FFFFFF	#000000	##FFFFFF
##666CB2	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5375B5

Deuteranopia (green-blind)

#4E6FB0

Tritanopia (blue-blind)

#4E7A86

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666cb2;
/* rgb */ color: rgb(102, 108, 178);
/* oklch */ color: oklch(55.7% 0.108 278.5);

Tailwind

colors: {
  custom: {
    50: '#9596c9',
    500: '#666cb2',
    950: '#000000',
  },
}

SCSS

$custom: #666cb2;
$custom-light: #9596c9;
$custom-dark: #000000;

JSON

{
  "hex": "#666cb2",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 178
  },
  "hsl": {
    "h": 235.263,
    "s": 33.043,
    "l": 54.902
  },
  "oklch": {
    "l": 0.55744,
    "c": 0.10816,
    "h": 278.5
  },
  "luminance": 0.16764
}

Semantic roles & 50–950 ramp

primary

#666CB2

secondary

#CAC7AA

accent

#C15FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666CB2

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

Preview Lab → · Contrast checker → · Palette generator →