#666BCA#666BCA

#666BCA is a mid, vivid blue. Relative luminance 0.176; OKLCH L 57.0% C 0.144 H 278.5°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666BCA
RGB	rgb(102, 107, 202)
HSL	hsl(237, 49%, 60%)
HSV	hsv(237, 50%, 79%)
CMYK	cmyk(49.5%, 47%, 0%, 20.8%)
CIE-LAB	lab(49.01, 23.93, -50.16)
CIE-LCH	lch(49.01, 55.58, 295.50°)
OKLab	oklab(56.97% 0.0213 -0.1426)
OKLCH	oklch(56.97% 0.144 278.5)
XYZ	xyz(21.3946, 17.6032, 58.1361)
Luminance	0.1760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BCA #CAC566

analogous

#669DCA #666BCA #9366CA

triadic

#666BCA #CA666B #6BCA66

tetradic

#666BCA #CA669D #CAC566 #66CA93

square

#666BCA #CA669D #CAC566 #66CA93

split-complementary

#666BCA #CA9366 #9DCA66

monochromatic

#2F3387 #3E44B4 #666BCA #9397DA #C1C3E9

Accessibility & contrast

On white

4.65

#666BCA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#666BCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666BCA

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

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

Color blindness preview

Protanopia (red-blind)

#4278CD

Deuteranopia (green-blind)

#3971C8

Tritanopia (blue-blind)

#3F7F91

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666bca;
/* rgb */ color: rgb(102, 107, 202);
/* oklch */ color: oklch(57.0% 0.144 278.5);

Tailwind

colors: {
  custom: {
    50: '#9895db',
    500: '#666bca',
    950: '#000000',
  },
}

SCSS

$custom: #666bca;
$custom-light: #9895db;
$custom-dark: #000000;

JSON

{
  "hex": "#666bca",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 202
  },
  "hsl": {
    "h": 237,
    "s": 48.544,
    "l": 59.608
  },
  "oklch": {
    "l": 0.56971,
    "c": 0.14419,
    "h": 278.5
  },
  "luminance": 0.17604
}

Semantic roles & 50–950 ramp

primary

#666BCA

secondary

#D9D7B2

accent

#D150D8

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666BCA

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

Preview Lab → · Contrast checker → · Palette generator →