#666AAA#666AAA

#666AAA is a mid, moderate blue. Relative luminance 0.160; OKLCH L 54.9% C 0.099 H 279.9°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#666AAA
RGB	rgb(102, 106, 170)
HSL	hsl(236, 29%, 53%)
HSV	hsv(236, 40%, 67%)
CMYK	cmyk(40%, 37.6%, 0%, 33.3%)
CIE-LAB	lab(47.02, 14.89, -34.79)
CIE-LCH	lch(47.02, 37.85, 293.17°)
OKLab	oklab(54.89% 0.017 -0.0977)
OKLCH	oklch(54.89% 0.099 279.9)
XYZ	xyz(17.8871, 16.0344, 40.1749)
Luminance	0.1603 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AAA #AAA666

analogous

#668CAA #666AAA #8466AA

triadic

#666AAA #AA666A #6AAA66

tetradic

#666AAA #AA668C #AAA666 #66AA84

square

#666AAA #AA668C #AAA666 #66AA84

split-complementary

#666AAA #AA8466 #8CAA66

monochromatic

#353860 #4B4F88 #666AAA #8D90C0 #B5B7D6

Accessibility & contrast

On white

4.99

#666AAA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#666AAA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666AAA

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AAA	#FFFFFF	#000000	##FFFFFF
##666AAA	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5472AD

Deuteranopia (green-blind)

#506DA8

Tritanopia (blue-blind)

#527782

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #666aaa;
/* rgb */ color: rgb(102, 106, 170);
/* oklch */ color: oklch(54.9% 0.099 279.9);

Tailwind

colors: {
  custom: {
    50: '#9494c3',
    500: '#666aaa',
    950: '#000000',
  },
}

SCSS

$custom: #666aaa;
$custom-light: #9494c3;
$custom-dark: #000000;

JSON

{
  "hex": "#666aaa",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 170
  },
  "hsl": {
    "h": 236.471,
    "s": 28.571,
    "l": 53.333
  },
  "oklch": {
    "l": 0.54891,
    "c": 0.09916,
    "h": 279.9
  },
  "luminance": 0.16035
}

Semantic roles & 50–950 ramp

primary

#666AAA

secondary

#C5C3A7

accent

#BF63C5

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666AAA

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

Preview Lab → · Contrast checker → · Palette generator →