#666BDC#666BDC

#666BDC is a mid, vivid blue. Relative luminance 0.185; OKLCH L 58.1% C 0.169 H 277.8°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#666BDC
RGB	rgb(102, 107, 220)
HSL	hsl(237, 63%, 63%)
HSV	hsv(237, 54%, 86%)
CMYK	cmyk(53.6%, 51.4%, 0%, 13.7%)
CIE-LAB	lab(50.10, 29.56, -58.66)
CIE-LCH	lch(50.10, 65.69, 296.74°)
OKLab	oklab(58.15% 0.0231 -0.1676)
OKLCH	oklch(58.15% 0.169 277.8)
XYZ	xyz(23.6514, 18.5060, 70.0220)
Luminance	0.1851 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BDC #DCD766

analogous

#66A6DC #666BDC #9C66DC

triadic

#666BDC #DC666B #6BDC66

tetradic

#666BDC #DC66A6 #DCD766 #66DC9C

square

#666BDC #DC66A6 #DCD766 #66DC9C

split-complementary

#666BDC #DC9C66 #A6DC66

monochromatic

#252AA2 #343BD1 #666BDC #989BE7 #CACBF3

Accessibility & contrast

On white

4.47

#666BDC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#666BDC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BDC

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BDC	#FFFFFF	#000000	##000000
##666BDC	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7CE0

Deuteranopia (green-blind)

#1D73DA

Tritanopia (blue-blind)

#2E8499

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666bdc;
/* rgb */ color: rgb(102, 107, 220);
/* oklch */ color: oklch(58.1% 0.169 277.8);

Tailwind

colors: {
  custom: {
    50: '#9a95e7',
    500: '#666bdc',
    950: '#000000',
  },
}

SCSS

$custom: #666bdc;
$custom-light: #9a95e7;
$custom-dark: #000000;

JSON

{
  "hex": "#666bdc",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 220
  },
  "hsl": {
    "h": 237.458,
    "s": 62.766,
    "l": 63.137
  },
  "oklch": {
    "l": 0.58147,
    "c": 0.16916,
    "h": 277.8
  },
  "luminance": 0.18507
}

Semantic roles & 50–950 ramp

primary

#666BDC

secondary

#E4E2BA

accent

#C31BCB

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BDC

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

Preview Lab → · Contrast checker → · Palette generator →