#666CC2#666CC2

#666CC2 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.7% C 0.131 H 278.3°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#666CC2
RGB	rgb(102, 108, 194)
HSL	hsl(236, 43%, 58%)
HSV	hsv(236, 47%, 76%)
CMYK	cmyk(47.4%, 44.3%, 0%, 23.9%)
CIE-LAB	lab(48.81, 20.85, -45.88)
CIE-LCH	lch(48.81, 50.40, 294.44°)
OKLab	oklab(56.67% 0.019 -0.13)
OKLCH	oklch(56.67% 0.131 278.3)
XYZ	xyz(20.5767, 17.4438, 53.3112)
Luminance	0.1744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CC2 #C2BC66

analogous

#669AC2 #666CC2 #8E66C2

triadic

#666CC2 #C2666C #6CC266

tetradic

#666CC2 #C2669A #C2BC66 #66C28E

square

#666CC2 #C2669A #C2BC66 #66C28E

split-complementary

#666CC2 #C28E66 #9AC266

monochromatic

#31367C #434AA8 #666CC2 #9296D3 #BEC0E5

Accessibility & contrast

On white

4.68

#666CC2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#666CC2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CC2

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CC2	#FFFFFF	#000000	##FFFFFF
##666CC2	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A78C5

Deuteranopia (green-blind)

#4271C0

Tritanopia (blue-blind)

#457E8D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666cc2;
/* rgb */ color: rgb(102, 108, 194);
/* oklch */ color: oklch(56.7% 0.131 278.3);

Tailwind

colors: {
  custom: {
    50: '#9796d5',
    500: '#666cc2',
    950: '#000000',
  },
}

SCSS

$custom: #666cc2;
$custom-light: #9796d5;
$custom-dark: #000000;

JSON

{
  "hex": "#666cc2",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 194
  },
  "hsl": {
    "h": 236.087,
    "s": 42.991,
    "l": 58.039
  },
  "oklch": {
    "l": 0.56674,
    "c": 0.13143,
    "h": 278.3
  },
  "luminance": 0.17445
}

Semantic roles & 50–950 ramp

primary

#666CC2

secondary

#D4D2B0

accent

#CB55D3

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666CC2

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

Preview Lab → · Contrast checker → · Palette generator →