#666BC1#666BC1

#666BC1 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.4% C 0.131 H 278.8°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#666BC1
RGB	rgb(102, 107, 193)
HSL	hsl(237, 42%, 58%)
HSV	hsv(237, 47%, 76%)
CMYK	cmyk(47.2%, 44.6%, 0%, 24.3%)
CIE-LAB	lab(48.50, 21.16, -45.81)
CIE-LCH	lch(48.50, 50.46, 294.79°)
OKLab	oklab(56.42% 0.0201 -0.1298)
OKLCH	oklch(56.42% 0.131 278.8)
XYZ	xyz(20.3599, 17.1894, 52.6868)
Luminance	0.1719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BC1 #C1BC66

analogous

#6699C1 #666BC1 #8E66C1

triadic

#666BC1 #C1666B #6BC166

tetradic

#666BC1 #C16699 #C1BC66 #66C18E

square

#666BC1 #C16699 #C1BC66 #66C18E

split-complementary

#666BC1 #C18E66 #99C166

monochromatic

#32367B #4349A6 #666BC1 #9295D3 #BDBFE4

Accessibility & contrast

On white

4.73

#666BC1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#666BC1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BC1

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BC1	#FFFFFF	#000000	##FFFFFF
##666BC1	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4977C4

Deuteranopia (green-blind)

#4270BF

Tritanopia (blue-blind)

#457D8D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666bc1;
/* rgb */ color: rgb(102, 107, 193);
/* oklch */ color: oklch(56.4% 0.131 278.8);

Tailwind

colors: {
  custom: {
    50: '#9795d4',
    500: '#666bc1',
    950: '#000000',
  },
}

SCSS

$custom: #666bc1;
$custom-light: #9795d4;
$custom-dark: #000000;

JSON

{
  "hex": "#666bc1",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 193
  },
  "hsl": {
    "h": 236.703,
    "s": 42.326,
    "l": 57.843
  },
  "oklch": {
    "l": 0.56415,
    "c": 0.13139,
    "h": 278.8
  },
  "luminance": 0.1719
}

Semantic roles & 50–950 ramp

primary

#666BC1

secondary

#D4D2AF

accent

#CB56D2

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666BC1

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

Preview Lab → · Contrast checker → · Palette generator →