#666FC0#666FC0

#666FC0 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.2% C 0.124 H 276.9°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#666FC0
RGB	rgb(102, 111, 192)
HSL	hsl(234, 42%, 58%)
HSV	hsv(234, 47%, 75%)
CMYK	cmyk(46.9%, 42.2%, 0%, 24.7%)
CIE-LAB	lab(49.49, 18.40, -43.65)
CIE-LCH	lch(49.49, 47.37, 292.86°)
OKLab	oklab(57.16% 0.015 -0.1235)
OKLCH	oklch(57.16% 0.124 276.9)
XYZ	xyz(20.6754, 17.9983, 52.2435)
Luminance	0.1800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FC0 #C0B766

analogous

#669CC0 #666FC0 #8A66C0

triadic

#666FC0 #C0666F #6FC066

tetradic

#666FC0 #C0669C #C0B766 #66C08A

square

#666FC0 #C0669C #C0B766 #66C08A

split-complementary

#666FC0 #C08A66 #9CC066

monochromatic

#32397A #444EA5 #666FC0 #9198D2 #BDC1E4

Accessibility & contrast

On white

4.57

#666FC0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#666FC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FC0

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FC0	#FFFFFF	#000000	##000000
##666FC0	1.00	4.57	4.60	4.60
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5079C3

Deuteranopia (green-blind)

#4872BE

Tritanopia (blue-blind)

#46808E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666fc0;
/* rgb */ color: rgb(102, 111, 192);
/* oklch */ color: oklch(57.2% 0.124 276.9);

Tailwind

colors: {
  custom: {
    50: '#9698d3',
    500: '#666fc0',
    950: '#000000',
  },
}

SCSS

$custom: #666fc0;
$custom-light: #9698d3;
$custom-dark: #000000;

JSON

{
  "hex": "#666fc0",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 192
  },
  "hsl": {
    "h": 234,
    "s": 41.667,
    "l": 57.647
  },
  "oklch": {
    "l": 0.57156,
    "c": 0.12442,
    "h": 276.9
  },
  "luminance": 0.17999
}

Semantic roles & 50–950 ramp

primary

#666FC0

secondary

#D3CFAF

accent

#C556D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666FC0

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

Preview Lab → · Contrast checker → · Palette generator →