#666BB2#666BB2

#666BB2 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.5% C 0.110 H 279.1°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#666BB2
RGB	rgb(102, 107, 178)
HSL	hsl(236, 33%, 55%)
HSV	hsv(236, 43%, 70%)
CMYK	cmyk(42.7%, 39.9%, 0%, 30.2%)
CIE-LAB	lab(47.69, 16.64, -38.40)
CIE-LCH	lch(47.69, 41.85, 293.42°)
OKLab	oklab(55.54% 0.0174 -0.1082)
OKLCH	oklch(55.54% 0.11 279.1)
XYZ	xyz(18.7707, 16.5537, 44.3170)
Luminance	0.1656 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BB2 #B2AD66

analogous

#6691B2 #666BB2 #8766B2

triadic

#666BB2 #B2666B #6BB266

tetradic

#666BB2 #B26691 #B2AD66 #66B287

square

#666BB2 #B26691 #B2AD66 #66B287

split-complementary

#666BB2 #B28766 #91B266

monochromatic

#353869 #494E92 #666BB2 #8F92C6 #B7BADB

Accessibility & contrast

On white

4.87

#666BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#666BB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BB2

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BB2	#FFFFFF	#000000	##FFFFFF
##666BB2	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5274B5

Deuteranopia (green-blind)

#4D6EB0

Tritanopia (blue-blind)

#4E7986

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #666bb2;
/* rgb */ color: rgb(102, 107, 178);
/* oklch */ color: oklch(55.5% 0.110 279.1);

Tailwind

colors: {
  custom: {
    50: '#9595c9',
    500: '#666bb2',
    950: '#000000',
  },
}

SCSS

$custom: #666bb2;
$custom-light: #9595c9;
$custom-dark: #000000;

JSON

{
  "hex": "#666bb2",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 178
  },
  "hsl": {
    "h": 236.053,
    "s": 33.043,
    "l": 54.902
  },
  "oklch": {
    "l": 0.55539,
    "c": 0.10958,
    "h": 279.1
  },
  "luminance": 0.16555
}

Semantic roles & 50–950 ramp

primary

#666BB2

secondary

#CAC8AA

accent

#C25FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #666BB2

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

Preview Lab → · Contrast checker → · Palette generator →