#666DC0#666DC0

#666DC0 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.8% C 0.127 H 277.9°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666DC0
RGB	rgb(102, 109, 192)
HSL	hsl(235, 42%, 58%)
HSV	hsv(235, 47%, 75%)
CMYK	cmyk(46.9%, 43.2%, 0%, 24.7%)
CIE-LAB	lab(48.97, 19.63, -44.49)
CIE-LCH	lch(48.97, 48.63, 293.81°)
OKLab	oklab(56.75% 0.0175 -0.126)
OKLCH	oklch(56.75% 0.127 277.9)
XYZ	xyz(20.4596, 17.5667, 52.1716)
Luminance	0.1757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DC0 #C0B966

analogous

#669AC0 #666DC0 #8C66C0

triadic

#666DC0 #C0666D #6DC066

tetradic

#666DC0 #C0669A #C0B966 #66C08C

square

#666DC0 #C0669A #C0B966 #66C08C

split-complementary

#666DC0 #C08C66 #9AC066

monochromatic

#32387A #444BA5 #666DC0 #9196D2 #BDC0E4

Accessibility & contrast

On white

4.65

#666DC0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#666DC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666DC0

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DC0	#FFFFFF	#000000	##FFFFFF
##666DC0	1.00	4.65	4.51	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C78C3

Deuteranopia (green-blind)

#4571BE

Tritanopia (blue-blind)

#467E8D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666dc0;
/* rgb */ color: rgb(102, 109, 192);
/* oklch */ color: oklch(56.8% 0.127 277.9);

Tailwind

colors: {
  custom: {
    50: '#9696d3',
    500: '#666dc0',
    950: '#000000',
  },
}

SCSS

$custom: #666dc0;
$custom-light: #9696d3;
$custom-dark: #000000;

JSON

{
  "hex": "#666dc0",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 192
  },
  "hsl": {
    "h": 235.333,
    "s": 41.667,
    "l": 57.647
  },
  "oklch": {
    "l": 0.56754,
    "c": 0.12717,
    "h": 277.9
  },
  "luminance": 0.17568
}

Semantic roles & 50–950 ramp

primary

#666DC0

secondary

#D3D0AF

accent

#C856D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666DC0

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

Preview Lab → · Contrast checker → · Palette generator →