#666BDB#666BDB

#666BDB is a mid, vivid blue. Relative luminance 0.185; OKLCH L 58.1% C 0.168 H 277.9°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#666BDB
RGB	rgb(102, 107, 219)
HSL	hsl(237, 62%, 63%)
HSV	hsv(237, 53%, 86%)
CMYK	cmyk(53.4%, 51.1%, 0%, 14.1%)
CIE-LAB	lab(50.04, 29.25, -58.19)
CIE-LCH	lch(50.04, 65.13, 296.68°)
OKLab	oklab(58.08% 0.023 -0.1662)
OKLCH	oklch(58.08% 0.168 277.9)
XYZ	xyz(23.5193, 18.4531, 69.3266)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BDB #DBD666

analogous

#66A5DB #666BDB #9B66DB

triadic

#666BDB #DB666B #6BDB66

tetradic

#666BDB #DB66A5 #DBD666 #66DB9B

square

#666BDB #DB66A5 #DBD666 #66DB9B

split-complementary

#666BDB #DB9B66 #A5DB66

monochromatic

#262BA1 #343BCF #666BDB #989BE7 #C9CBF2

Accessibility & contrast

On white

4.48

#666BDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#666BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BDB

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BDB	#FFFFFF	#000000	##000000
##666BDB	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#307CDF

Deuteranopia (green-blind)

#1F72D9

Tritanopia (blue-blind)

#2F8499

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666bdb;
/* rgb */ color: rgb(102, 107, 219);
/* oklch */ color: oklch(58.1% 0.168 277.9);

Tailwind

colors: {
  custom: {
    50: '#9a95e7',
    500: '#666bdb',
    950: '#000000',
  },
}

SCSS

$custom: #666bdb;
$custom-light: #9a95e7;
$custom-dark: #000000;

JSON

{
  "hex": "#666bdb",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 219
  },
  "hsl": {
    "h": 237.436,
    "s": 61.905,
    "l": 62.941
  },
  "oklch": {
    "l": 0.58079,
    "c": 0.16779,
    "h": 277.9
  },
  "luminance": 0.18455
}

Semantic roles & 50–950 ramp

primary

#666BDB

secondary

#E3E2B9

accent

#C21CCA

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666BDB

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

Preview Lab → · Contrast checker → · Palette generator →