#666BC2#666BC2

#666BC2 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.5% C 0.133 H 278.8°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#666BC2
RGB	rgb(102, 107, 194)
HSL	hsl(237, 43%, 58%)
HSV	hsv(237, 47%, 76%)
CMYK	cmyk(47.4%, 44.8%, 0%, 23.9%)
CIE-LAB	lab(48.55, 21.47, -46.30)
CIE-LCH	lch(48.55, 51.03, 294.87°)
OKLab	oklab(56.48% 0.0202 -0.1313)
OKLCH	oklch(56.48% 0.133 278.8)
XYZ	xyz(20.4718, 17.2341, 53.2763)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BC2 #C2BD66

analogous

#6699C2 #666BC2 #8F66C2

triadic

#666BC2 #C2666B #6BC266

tetradic

#666BC2 #C26699 #C2BD66 #66C28F

square

#666BC2 #C26699 #C2BD66 #66C28F

split-complementary

#666BC2 #C28F66 #99C266

monochromatic

#31367C #4348A8 #666BC2 #9295D3 #BEC0E5

Accessibility & contrast

On white

4.72

#666BC2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#666BC2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BC2

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BC2	#FFFFFF	#000000	##FFFFFF
##666BC2	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4877C5

Deuteranopia (green-blind)

#4170C0

Tritanopia (blue-blind)

#457D8D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666bc2;
/* rgb */ color: rgb(102, 107, 194);
/* oklch */ color: oklch(56.5% 0.133 278.8);

Tailwind

colors: {
  custom: {
    50: '#9795d5',
    500: '#666bc2',
    950: '#000000',
  },
}

SCSS

$custom: #666bc2;
$custom-light: #9795d5;
$custom-dark: #000000;

JSON

{
  "hex": "#666bc2",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 194
  },
  "hsl": {
    "h": 236.739,
    "s": 42.991,
    "l": 58.039
  },
  "oklch": {
    "l": 0.56476,
    "c": 0.13283,
    "h": 278.8
  },
  "luminance": 0.17235
}

Semantic roles & 50–950 ramp

primary

#666BC2

secondary

#D4D2B0

accent

#CC55D3

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666BC2

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

Preview Lab → · Contrast checker → · Palette generator →