#666CCC#666CCC

#666CCC is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.3% C 0.146 H 278.1°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#666CCC
RGB	rgb(102, 108, 204)
HSL	hsl(236, 50%, 60%)
HSV	hsv(236, 50%, 80%)
CMYK	cmyk(50%, 47.1%, 0%, 20%)
CIE-LAB	lab(49.38, 23.94, -50.71)
CIE-LCH	lch(49.38, 56.08, 295.27°)
OKLab	oklab(57.29% 0.0204 -0.1442)
OKLCH	oklch(57.29% 0.146 278.1)
XYZ	xyz(21.7378, 17.9083, 59.4262)
Luminance	0.1791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CCC #CCC666

analogous

#669FCC #666CCC #9366CC

triadic

#666CCC #CC666C #6CCC66

tetradic

#666CCC #CC669F #CCC666 #66CC93

square

#666CCC #CC669F #CCC666 #66CC93

split-complementary

#666CCC #CC9366 #9FCC66

monochromatic

#2E338A #3D44B8 #666CCC #9498DB #C2C4EB

Accessibility & contrast

On white

4.58

#666CCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#666CCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CCC

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CCC	#FFFFFF	#000000	##000000
##666CCC	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#427AD0

Deuteranopia (green-blind)

#3871CA

Tritanopia (blue-blind)

#3D8192

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ccc;
/* rgb */ color: rgb(102, 108, 204);
/* oklch */ color: oklch(57.3% 0.146 278.1);

Tailwind

colors: {
  custom: {
    50: '#9896dc',
    500: '#666ccc',
    950: '#000000',
  },
}

SCSS

$custom: #666ccc;
$custom-light: #9896dc;
$custom-dark: #000000;

JSON

{
  "hex": "#666ccc",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 204
  },
  "hsl": {
    "h": 236.471,
    "s": 50,
    "l": 60
  },
  "oklch": {
    "l": 0.57291,
    "c": 0.14565,
    "h": 278.1
  },
  "luminance": 0.1791
}

Semantic roles & 50–950 ramp

primary

#666CCC

secondary

#DBD8B3

accent

#D14EDA

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666CCC

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

Preview Lab → · Contrast checker → · Palette generator →