#666CAA#666CAA

#666CAA is a mid, moderate blue. Relative luminance 0.165; OKLCH L 55.3% C 0.096 H 278.5°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#666CAA
RGB	rgb(102, 108, 170)
HSL	hsl(235, 29%, 53%)
HSV	hsv(235, 40%, 67%)
CMYK	cmyk(40%, 36.5%, 0%, 33.3%)
CIE-LAB	lab(47.56, 13.67, -33.94)
CIE-LCH	lch(47.56, 36.59, 291.93°)
OKLab	oklab(55.31% 0.0143 -0.0952)
OKLCH	oklch(55.31% 0.096 278.5)
XYZ	xyz(18.0956, 16.4514, 40.2444)
Luminance	0.1645 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CAA #AAA466

analogous

#668EAA #666CAA #8266AA

triadic

#666CAA #AA666C #6CAA66

tetradic

#666CAA #AA668E #AAA466 #66AA82

square

#666CAA #AA668E #AAA466 #66AA82

split-complementary

#666CAA #AA8266 #8EAA66

monochromatic

#353960 #4B5188 #666CAA #8D92C0 #B5B8D6

Accessibility & contrast

On white

4.89

#666CAA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#666CAA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CAA

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CAA	#FFFFFF	#000000	##FFFFFF
##666CAA	1.00	4.89	4.29	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5773AC

Deuteranopia (green-blind)

#536EA9

Tritanopia (blue-blind)

#527883

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #666caa;
/* rgb */ color: rgb(102, 108, 170);
/* oklch */ color: oklch(55.3% 0.096 278.5);

Tailwind

colors: {
  custom: {
    50: '#9496c3',
    500: '#666caa',
    950: '#000000',
  },
}

SCSS

$custom: #666caa;
$custom-light: #9496c3;
$custom-dark: #000000;

JSON

{
  "hex": "#666caa",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 170
  },
  "hsl": {
    "h": 234.706,
    "s": 28.571,
    "l": 53.333
  },
  "oklch": {
    "l": 0.55307,
    "c": 0.09629,
    "h": 278.5
  },
  "luminance": 0.16452
}

Semantic roles & 50–950 ramp

primary

#666CAA

secondary

#C5C2A7

accent

#BC63C5

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666CAA

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

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