#666BD7#666BD7

#666BD7 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.8% C 0.162 H 278.0°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666BD7
RGB	rgb(102, 107, 215)
HSL	hsl(237, 59%, 62%)
HSV	hsv(237, 53%, 84%)
CMYK	cmyk(52.6%, 50.2%, 0%, 15.7%)
CIE-LAB	lab(49.79, 27.99, -56.33)
CIE-LCH	lch(49.79, 62.90, 296.42°)
OKLab	oklab(57.81% 0.0227 -0.1607)
OKLCH	oklch(57.81% 0.162 278)
XYZ	xyz(22.9991, 18.2450, 66.5865)
Luminance	0.1825 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BD7 #D7D266

analogous

#66A4D7 #666BD7 #9A66D7

triadic

#666BD7 #D7666B #6BD766

tetradic

#666BD7 #D766A4 #D7D266 #66D79A

square

#666BD7 #D766A4 #D7D266 #66D79A

split-complementary

#666BD7 #D79A66 #A4D766

monochromatic

#282D9A #353CCA #666BD7 #979AE4 #C7C9F0

Accessibility & contrast

On white

4.52

#666BD7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#666BD7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BD7

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BD7	#FFFFFF	#000000	##000000
##666BD7	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#357BDB

Deuteranopia (green-blind)

#2772D5

Tritanopia (blue-blind)

#348397

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666bd7;
/* rgb */ color: rgb(102, 107, 215);
/* oklch */ color: oklch(57.8% 0.162 278.0);

Tailwind

colors: {
  custom: {
    50: '#9995e4',
    500: '#666bd7',
    950: '#000000',
  },
}

SCSS

$custom: #666bd7;
$custom-light: #9995e4;
$custom-dark: #000000;

JSON

{
  "hex": "#666bd7",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 215
  },
  "hsl": {
    "h": 237.345,
    "s": 58.549,
    "l": 62.157
  },
  "oklch": {
    "l": 0.57812,
    "c": 0.16231,
    "h": 278
  },
  "luminance": 0.18246
}

Semantic roles & 50–950 ramp

primary

#666BD7

secondary

#E1DFB8

accent

#BF1FC6

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666BD7

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

Preview Lab → · Contrast checker → · Palette generator →