#666DDB#666DDB

#666DDB is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.5% C 0.165 H 277.2°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#666DDB
RGB	rgb(102, 109, 219)
HSL	hsl(236, 62%, 63%)
HSV	hsv(236, 53%, 86%)
CMYK	cmyk(53.4%, 50.2%, 0%, 14.1%)
CIE-LAB	lab(50.54, 28.03, -57.39)
CIE-LCH	lch(50.54, 63.87, 296.03°)
OKLab	oklab(58.46% 0.0208 -0.1638)
OKLCH	oklch(58.46% 0.165 277.2)
XYZ	xyz(23.7303, 18.8750, 69.3969)
Luminance	0.1888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DDB #DBD466

analogous

#66A8DB #666DDB #9966DB

triadic

#666DDB #DB666D #6DDB66

tetradic

#666DDB #DB66A8 #DBD466 #66DB99

square

#666DDB #DB66A8 #DBD466 #66DB99

split-complementary

#666DDB #DB9966 #A8DB66

monochromatic

#262DA1 #343ECF #666DDB #989CE7 #C9CCF2

Accessibility & contrast

On white

4.40

#666DDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#666DDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DDB

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DDB	#FFFFFF	#000000	##000000
##666DDB	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#357DDF

Deuteranopia (green-blind)

#2574D9

Tritanopia (blue-blind)

#2F869A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666ddb;
/* rgb */ color: rgb(102, 109, 219);
/* oklch */ color: oklch(58.5% 0.165 277.2);

Tailwind

colors: {
  custom: {
    50: '#9a96e7',
    500: '#666ddb',
    950: '#000000',
  },
}

SCSS

$custom: #666ddb;
$custom-light: #9a96e7;
$custom-dark: #000000;

JSON

{
  "hex": "#666ddb",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 219
  },
  "hsl": {
    "h": 236.41,
    "s": 61.905,
    "l": 62.941
  },
  "oklch": {
    "l": 0.58455,
    "c": 0.16515,
    "h": 277.2
  },
  "luminance": 0.18877
}

Semantic roles & 50–950 ramp

primary

#666DDB

secondary

#E3E1B9

accent

#BF1CCA

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666DDB

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

Preview Lab → · Contrast checker → · Palette generator →