#666BC7#666BC7

#666BC7 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.8% C 0.140 H 278.6°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#666BC7
RGB	rgb(102, 107, 199)
HSL	hsl(237, 46%, 59%)
HSV	hsv(237, 49%, 78%)
CMYK	cmyk(48.7%, 46.2%, 0%, 22%)
CIE-LAB	lab(48.84, 23.00, -48.72)
CIE-LCH	lch(48.84, 53.88, 295.27°)
OKLab	oklab(56.78% 0.0209 -0.1384)
OKLCH	oklch(56.78% 0.14 278.6)
XYZ	xyz(21.0428, 17.4625, 56.2836)
Luminance	0.1746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BC7 #C7C266

analogous

#669CC7 #666BC7 #9266C7

triadic

#666BC7 #C7666B #6BC766

tetradic

#666BC7 #C7669C #C7C266 #66C792

square

#666BC7 #C7669C #C7C266 #66C792

split-complementary

#666BC7 #C79266 #9CC766

monochromatic

#303483 #4046B0 #666BC7 #9396D7 #C0C2E8

Accessibility & contrast

On white

4.67

#666BC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#666BC7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BC7

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BC7	#FFFFFF	#000000	##FFFFFF
##666BC7	1.00	4.67	4.49	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4478CA

Deuteranopia (green-blind)

#3C70C5

Tritanopia (blue-blind)

#417F8F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666bc7;
/* rgb */ color: rgb(102, 107, 199);
/* oklch */ color: oklch(56.8% 0.140 278.6);

Tailwind

colors: {
  custom: {
    50: '#9795d8',
    500: '#666bc7',
    950: '#000000',
  },
}

SCSS

$custom: #666bc7;
$custom-light: #9795d8;
$custom-dark: #000000;

JSON

{
  "hex": "#666bc7",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 199
  },
  "hsl": {
    "h": 236.907,
    "s": 46.411,
    "l": 59.02
  },
  "oklch": {
    "l": 0.56783,
    "c": 0.13995,
    "h": 278.6
  },
  "luminance": 0.17464
}

Semantic roles & 50–950 ramp

primary

#666BC7

secondary

#D7D5B1

accent

#CF52D6

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666BC7

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

Preview Lab → · Contrast checker → · Palette generator →