#666CA6#666CA6

#666CA6 is a mid, moderate blue. Relative luminance 0.163; OKLCH L 55.1% C 0.090 H 278.5°. Best body text is #FFFFFF at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#666CA6
RGB	rgb(102, 108, 166)
HSL	hsl(234, 26%, 53%)
HSV	hsv(234, 39%, 65%)
CMYK	cmyk(38.6%, 34.9%, 0%, 34.9%)
CIE-LAB	lab(47.37, 12.51, -31.90)
CIE-LCH	lch(47.37, 34.27, 291.41°)
OKLab	oklab(55.1% 0.0133 -0.0893)
OKLCH	oklch(55.1% 0.09 278.5)
XYZ	xyz(17.7230, 16.3024, 38.2819)
Luminance	0.1630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CA6 #A6A066

analogous

#668CA6 #666CA6 #8066A6

triadic

#666CA6 #A6666C #6CA666

tetradic

#666CA6 #A6668C #A6A066 #66A680

square

#666CA6 #A6668C #A6A066 #66A680

split-complementary

#666CA6 #A68066 #8CA666

monochromatic

#36395C #4C5183 #666CA6 #8D91BD #B3B6D3

Accessibility & contrast

On white

4.93

#666CA6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#666CA6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CA6

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CA6	#FFFFFF	#000000	##FFFFFF
##666CA6	1.00	4.93	4.26	4.93
#FFFFFF	4.93	1.00	21.00	1.00
#000000	4.26	21.00	1.00	21.00
##FFFFFF	4.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5973A8

Deuteranopia (green-blind)

#556EA5

Tritanopia (blue-blind)

#537781

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ca6;
/* rgb */ color: rgb(102, 108, 166);
/* oklch */ color: oklch(55.1% 0.090 278.5);

Tailwind

colors: {
  custom: {
    50: '#9496c0',
    500: '#666ca6',
    950: '#000000',
  },
}

SCSS

$custom: #666ca6;
$custom-light: #9496c0;
$custom-dark: #000000;

JSON

{
  "hex": "#666ca6",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 166
  },
  "hsl": {
    "h": 234.375,
    "s": 26.446,
    "l": 52.549
  },
  "oklch": {
    "l": 0.55095,
    "c": 0.09029,
    "h": 278.5
  },
  "luminance": 0.16303
}

Semantic roles & 50–950 ramp

primary

#666CA6

secondary

#C2BFA6

accent

#BA65C3

background

#F9F9FB

surface

#F2F1F7

border

#CCCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666CA6

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

Preview Lab → · Contrast checker → · Palette generator →