#666CD2#666CD2

#666CD2 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.7% C 0.154 H 277.9°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#666CD2
RGB	rgb(102, 108, 210)
HSL	hsl(237, 55%, 61%)
HSV	hsv(237, 51%, 82%)
CMYK	cmyk(51.4%, 48.6%, 0%, 17.6%)
CIE-LAB	lab(49.74, 25.81, -53.57)
CIE-LCH	lch(49.74, 59.46, 295.73°)
OKLab	oklab(57.68% 0.0211 -0.1526)
OKLCH	oklch(57.68% 0.154 277.9)
XYZ	xyz(22.4713, 18.2017, 63.2895)
Luminance	0.1820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CD2 #D2CC66

analogous

#66A2D2 #666CD2 #9666D2

triadic

#666CD2 #D2666C #6CD266

tetradic

#666CD2 #D266A2 #D2CC66 #66D296

square

#666CD2 #D266A2 #D2CC66 #66D296

split-complementary

#666CD2 #D29666 #A2D266

monochromatic

#2B3193 #3941C2 #666CD2 #9599E0 #C5C7EE

Accessibility & contrast

On white

4.53

#666CD2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#666CD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CD2

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CD2	#FFFFFF	#000000	##000000
##666CD2	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D7BD6

Deuteranopia (green-blind)

#3172D0

Tritanopia (blue-blind)

#388295

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666cd2;
/* rgb */ color: rgb(102, 108, 210);
/* oklch */ color: oklch(57.7% 0.154 277.9);

Tailwind

colors: {
  custom: {
    50: '#9996e0',
    500: '#666cd2',
    950: '#000000',
  },
}

SCSS

$custom: #666cd2;
$custom-light: #9996e0;
$custom-dark: #000000;

JSON

{
  "hex": "#666cd2",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 210
  },
  "hsl": {
    "h": 236.667,
    "s": 54.545,
    "l": 61.176
  },
  "oklch": {
    "l": 0.57675,
    "c": 0.15405,
    "h": 277.9
  },
  "luminance": 0.18203
}

Semantic roles & 50–950 ramp

primary

#666CD2

secondary

#DEDCB6

accent

#B923C2

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666CD2

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

Preview Lab → · Contrast checker → · Palette generator →