#666AA5#666AA5

#666AA5 is a mid, moderate blue. Relative luminance 0.158; OKLCH L 54.6% C 0.092 H 279.9°. Best body text is #FFFFFF at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#666AA5
RGB	rgb(102, 106, 165)
HSL	hsl(236, 26%, 52%)
HSV	hsv(236, 38%, 65%)
CMYK	cmyk(38.2%, 35.8%, 0%, 35.3%)
CIE-LAB	lab(46.78, 13.45, -32.24)
CIE-LCH	lch(46.78, 34.94, 292.64°)
OKLab	oklab(54.62% 0.0158 -0.0903)
OKLCH	oklch(54.62% 0.092 279.9)
XYZ	xyz(17.4231, 15.8488, 37.7311)
Luminance	0.1585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AA5 #A5A166

analogous

#668AA5 #666AA5 #8166A5

triadic

#666AA5 #A5666A #6AA566

tetradic

#666AA5 #A5668A #A5A166 #66A581

square

#666AA5 #A5668A #A5A166 #66A581

split-complementary

#666AA5 #A58166 #8AA566

monochromatic

#36385B #4C5082 #666AA5 #8D90BC #B3B5D2

Accessibility & contrast

On white

5.04

#666AA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.17

#666AA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666AA5

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AA5	#FFFFFF	#000000	##FFFFFF
##666AA5	1.00	5.04	4.17	5.04
#FFFFFF	5.04	1.00	21.00	1.00
#000000	4.17	21.00	1.00	21.00
##FFFFFF	5.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5771A7

Deuteranopia (green-blind)

#536DA4

Tritanopia (blue-blind)

#547580

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #666aa5;
/* rgb */ color: rgb(102, 106, 165);
/* oklch */ color: oklch(54.6% 0.092 279.9);

Tailwind

colors: {
  custom: {
    50: '#9494c0',
    500: '#666aa5',
    950: '#000000',
  },
}

SCSS

$custom: #666aa5;
$custom-light: #9494c0;
$custom-dark: #000000;

JSON

{
  "hex": "#666aa5",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 165
  },
  "hsl": {
    "h": 236.19,
    "s": 25.926,
    "l": 52.353
  },
  "oklch": {
    "l": 0.54623,
    "c": 0.09167,
    "h": 279.9
  },
  "luminance": 0.15849
}

Semantic roles & 50–950 ramp

primary

#666AA5

secondary

#C1BFA6

accent

#BC65C2

background

#F9F9FB

surface

#F2F1F7

border

#CCCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666AA5

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

Preview Lab → · Contrast checker → · Palette generator →