#666CD6#666CD6

#666CD6 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.9% C 0.160 H 277.7°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#666CD6
RGB	rgb(102, 108, 214)
HSL	hsl(237, 58%, 62%)
HSV	hsv(237, 52%, 84%)
CMYK	cmyk(52.3%, 49.5%, 0%, 16.1%)
CIE-LAB	lab(49.98, 27.06, -55.45)
CIE-LCH	lch(49.98, 61.71, 296.01°)
OKLab	oklab(57.94% 0.0215 -0.1581)
OKLCH	oklch(57.94% 0.16 277.7)
XYZ	xyz(22.9758, 18.4035, 65.9468)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CD6 #D6D066

analogous

#66A4D6 #666CD6 #9866D6

triadic

#666CD6 #D6666C #6CD666

tetradic

#666CD6 #D666A4 #D6D066 #66D698

square

#666CD6 #D666A4 #D6D066 #66D698

split-complementary

#666CD6 #D69866 #A4D666

monochromatic

#292F99 #363EC9 #666CD6 #969AE3 #C7C9F0

Accessibility & contrast

On white

4.49

#666CD6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#666CD6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CD6

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CD6	#FFFFFF	#000000	##000000
##666CD6	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#397CDA

Deuteranopia (green-blind)

#2B73D4

Tritanopia (blue-blind)

#358397

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666cd6;
/* rgb */ color: rgb(102, 108, 214);
/* oklch */ color: oklch(57.9% 0.160 277.7);

Tailwind

colors: {
  custom: {
    50: '#9996e3',
    500: '#666cd6',
    950: '#000000',
  },
}

SCSS

$custom: #666cd6;
$custom-light: #9996e3;
$custom-dark: #000000;

JSON

{
  "hex": "#666cd6",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 214
  },
  "hsl": {
    "h": 236.786,
    "s": 57.732,
    "l": 61.961
  },
  "oklch": {
    "l": 0.57935,
    "c": 0.15959,
    "h": 277.7
  },
  "luminance": 0.18405
}

Semantic roles & 50–950 ramp

primary

#666CD6

secondary

#E1DEB7

accent

#BC20C5

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D15

muted

#7E7E84

Preview Lab

Preview with #666CD6

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

Preview Lab → · Contrast checker → · Palette generator →