#666DDC#666DDC

#666DDC is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.5% C 0.167 H 277.2°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#666DDC
RGB	rgb(102, 109, 220)
HSL	hsl(236, 63%, 63%)
HSV	hsv(236, 54%, 86%)
CMYK	cmyk(53.6%, 50.5%, 0%, 13.7%)
CIE-LAB	lab(50.60, 28.34, -57.86)
CIE-LCH	lch(50.60, 64.43, 296.10°)
OKLab	oklab(58.52% 0.0209 -0.1652)
OKLCH	oklch(58.52% 0.167 277.2)
XYZ	xyz(23.8623, 18.9278, 70.0923)
Luminance	0.1893 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DDC #DCD566

analogous

#66A8DC #666DDC #9A66DC

triadic

#666DDC #DC666D #6DDC66

tetradic

#666DDC #DC66A8 #DCD566 #66DC9A

square

#666DDC #DC66A8 #DCD566 #66DC9A

split-complementary

#666DDC #DC9A66 #A8DC66

monochromatic

#252DA2 #343DD1 #666DDC #989DE7 #CACCF3

Accessibility & contrast

On white

4.39

#666DDC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#666DDC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DDC

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DDC	#FFFFFF	#000000	##000000
##666DDC	1.00	4.39	4.79	4.79
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#347DE0

Deuteranopia (green-blind)

#2474DA

Tritanopia (blue-blind)

#2E869A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666ddc;
/* rgb */ color: rgb(102, 109, 220);
/* oklch */ color: oklch(58.5% 0.167 277.2);

Tailwind

colors: {
  custom: {
    50: '#9a96e7',
    500: '#666ddc',
    950: '#000000',
  },
}

SCSS

$custom: #666ddc;
$custom-light: #9a96e7;
$custom-dark: #000000;

JSON

{
  "hex": "#666ddc",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 220
  },
  "hsl": {
    "h": 236.441,
    "s": 62.766,
    "l": 63.137
  },
  "oklch": {
    "l": 0.58522,
    "c": 0.16652,
    "h": 277.2
  },
  "luminance": 0.18929
}

Semantic roles & 50–950 ramp

primary

#666DDC

secondary

#E4E2BA

accent

#C01BCB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666DDC

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

Preview Lab → · Contrast checker → · Palette generator →