#66639C#66639C

#66639C is a mid, moderate blue. Relative luminance 0.141; OKLCH L 52.7% C 0.089 H 285.3°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#66639C
RGB	rgb(102, 99, 156)
HSL	hsl(243, 22%, 50%)
HSV	hsv(243, 37%, 61%)
CMYK	cmyk(34.6%, 36.5%, 0%, 38.8%)
CIE-LAB	lab(44.44, 15.20, -30.58)
CIE-LCH	lch(44.44, 34.15, 296.42°)
OKLab	oklab(52.69% 0.0234 -0.0855)
OKLCH	oklch(52.69% 0.089 285.3)
XYZ	xyz(15.9405, 14.1483, 33.3371)
Luminance	0.1415 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66639C #999C63

analogous

#637C9C #66639C #83639C

triadic

#66639C #9C6663 #639C66

tetradic

#66639C #9C637C #999C63 #639C83

square

#66639C #9C637C #999C63 #639C83

split-complementary

#66639C #9C8363 #7C9C63

monochromatic

#353351 #4E4B77 #66639C #8B88B4 #AFAECC

Accessibility & contrast

On white

5.48

#66639C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#66639C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #66639C

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66639C	#FFFFFF	#000000	##FFFFFF
##66639C	1.00	5.48	3.83	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#526B9E

Deuteranopia (green-blind)

#50679B

Tritanopia (blue-blind)

#586E78

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #66639c;
/* rgb */ color: rgb(102, 99, 156);
/* oklch */ color: oklch(52.7% 0.089 285.3);

Tailwind

colors: {
  custom: {
    50: '#938fb9',
    500: '#66639c',
    950: '#000000',
  },
}

SCSS

$custom: #66639c;
$custom-light: #938fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#66639c",
  "rgb": {
    "r": 102,
    "g": 99,
    "b": 156
  },
  "hsl": {
    "h": 243.158,
    "s": 22.353,
    "l": 50
  },
  "oklch": {
    "l": 0.52691,
    "c": 0.08865,
    "h": 285.3
  },
  "luminance": 0.14149
}

Semantic roles & 50–950 ramp

primary

#66639C

secondary

#B9BAA1

accent

#BF69BA

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0C11

muted

#7E7D80

Preview Lab

Preview with #66639C

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

Preview Lab → · Contrast checker → · Palette generator →