#666FD2#666FD2

#666FD2 is a mid, vivid blue. Relative luminance 0.188; OKLCH L 58.3% C 0.150 H 276.8°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#666FD2
RGB	rgb(102, 111, 210)
HSL	hsl(235, 55%, 61%)
HSV	hsv(235, 51%, 82%)
CMYK	cmyk(51.4%, 47.1%, 0%, 17.6%)
CIE-LAB	lab(50.51, 23.98, -52.34)
CIE-LCH	lch(50.51, 57.57, 294.61°)
OKLab	oklab(58.25% 0.0177 -0.149)
OKLCH	oklch(58.25% 0.15 276.8)
XYZ	xyz(22.7931, 18.8454, 63.3967)
Luminance	0.1885 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FD2 #D2C966

analogous

#66A5D2 #666FD2 #9366D2

triadic

#666FD2 #D2666F #6FD266

tetradic

#666FD2 #D266A5 #D2C966 #66D293

square

#666FD2 #D266A5 #D2C966 #66D293

split-complementary

#666FD2 #D29366 #A5D266

monochromatic

#2B3493 #3944C2 #666FD2 #959CE0 #C5C8EE

Accessibility & contrast

On white

4.40

#666FD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#666FD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FD2

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FD2	#FFFFFF	#000000	##000000
##666FD2	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#437DD6

Deuteranopia (green-blind)

#3774D0

Tritanopia (blue-blind)

#388596

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666fd2;
/* rgb */ color: rgb(102, 111, 210);
/* oklch */ color: oklch(58.3% 0.150 276.8);

Tailwind

colors: {
  custom: {
    50: '#9998e0',
    500: '#666fd2',
    950: '#000000',
  },
}

SCSS

$custom: #666fd2;
$custom-light: #9998e0;
$custom-dark: #000000;

JSON

{
  "hex": "#666fd2",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 210
  },
  "hsl": {
    "h": 235,
    "s": 54.545,
    "l": 61.176
  },
  "oklch": {
    "l": 0.58254,
    "c": 0.15002,
    "h": 276.8
  },
  "luminance": 0.18847
}

Semantic roles & 50–950 ramp

primary

#666FD2

secondary

#DEDBB6

accent

#B523C2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666FD2

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

Preview Lab → · Contrast checker → · Palette generator →