#666FAA#666FAA

#666FAA is a mid, moderate blue. Relative luminance 0.171; OKLCH L 55.9% C 0.092 H 276.4°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#666FAA
RGB	rgb(102, 111, 170)
HSL	hsl(232, 29%, 53%)
HSV	hsv(232, 40%, 67%)
CMYK	cmyk(40%, 34.7%, 0%, 33.3%)
CIE-LAB	lab(48.38, 11.84, -32.66)
CIE-LCH	lch(48.38, 34.74, 289.92°)
OKLab	oklab(55.94% 0.0102 -0.0915)
OKLCH	oklch(55.94% 0.092 276.4)
XYZ	xyz(18.4175, 17.0951, 40.3517)
Luminance	0.1710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FAA #AAA166

analogous

#6691AA #666FAA #7F66AA

triadic

#666FAA #AA666F #6FAA66

tetradic

#666FAA #AA6691 #AAA166 #66AA7F

square

#666FAA #AA6691 #AAA166 #66AA7F

split-complementary

#666FAA #AA7F66 #91AA66

monochromatic

#353B60 #4B5388 #666FAA #8D94C0 #B5B9D6

Accessibility & contrast

On white

4.75

#666FAA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#666FAA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FAA

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FAA	#FFFFFF	#000000	##FFFFFF
##666FAA	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B76AC

Deuteranopia (green-blind)

#5670A9

Tritanopia (blue-blind)

#517B85

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666faa;
/* rgb */ color: rgb(102, 111, 170);
/* oklch */ color: oklch(55.9% 0.092 276.4);

Tailwind

colors: {
  custom: {
    50: '#9498c3',
    500: '#666faa',
    950: '#000000',
  },
}

SCSS

$custom: #666faa;
$custom-light: #9498c3;
$custom-dark: #000000;

JSON

{
  "hex": "#666faa",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 170
  },
  "hsl": {
    "h": 232.059,
    "s": 28.571,
    "l": 53.333
  },
  "oklch": {
    "l": 0.55937,
    "c": 0.09206,
    "h": 276.4
  },
  "luminance": 0.17096
}

Semantic roles & 50–950 ramp

primary

#666FAA

secondary

#C5C1A7

accent

#B863C5

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666FAA

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

Preview Lab → · Contrast checker → · Palette generator →