#666AB2#666AB2

#666AB2 is a mid, moderate blue. Relative luminance 0.163; OKLCH L 55.3% C 0.111 H 279.7°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#666AB2
RGB	rgb(102, 106, 178)
HSL	hsl(237, 33%, 55%)
HSV	hsv(237, 43%, 70%)
CMYK	cmyk(42.7%, 40.4%, 0%, 30.2%)
CIE-LAB	lab(47.43, 17.25, -38.82)
CIE-LCH	lch(47.43, 42.48, 293.95°)
OKLab	oklab(55.34% 0.0187 -0.1094)
OKLCH	oklch(55.34% 0.111 279.7)
XYZ	xyz(18.6670, 16.3464, 44.2824)
Luminance	0.1635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AB2 #B2AE66

analogous

#6690B2 #666AB2 #8866B2

triadic

#666AB2 #B2666A #6AB266

tetradic

#666AB2 #B26690 #B2AE66 #66B288

square

#666AB2 #B26690 #B2AE66 #66B288

split-complementary

#666AB2 #B28866 #90B266

monochromatic

#353869 #494D92 #666AB2 #8F92C6 #B7B9DB

Accessibility & contrast

On white

4.92

#666AB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#666AB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666AB2

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AB2	#FFFFFF	#000000	##FFFFFF
##666AB2	1.00	4.92	4.27	4.92
#FFFFFF	4.92	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5073B5

Deuteranopia (green-blind)

#4C6EB0

Tritanopia (blue-blind)

#4E7885

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ab2;
/* rgb */ color: rgb(102, 106, 178);
/* oklch */ color: oklch(55.3% 0.111 279.7);

Tailwind

colors: {
  custom: {
    50: '#9594c9',
    500: '#666ab2',
    950: '#000000',
  },
}

SCSS

$custom: #666ab2;
$custom-light: #9594c9;
$custom-dark: #000000;

JSON

{
  "hex": "#666ab2",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 178
  },
  "hsl": {
    "h": 236.842,
    "s": 33.043,
    "l": 54.902
  },
  "oklch": {
    "l": 0.55335,
    "c": 0.11102,
    "h": 279.7
  },
  "luminance": 0.16347
}

Semantic roles & 50–950 ramp

primary

#666AB2

secondary

#CAC8AA

accent

#C45FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #666AB2

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

Preview Lab → · Contrast checker → · Palette generator →