#646D8A#646D8A

#646D8A is a mid, muted blue. Relative luminance 0.155; OKLCH L 53.8% C 0.047 H 271.3°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#646D8A
RGB	rgb(100, 109, 138)
HSL	hsl(226, 16%, 47%)
HSV	hsv(226, 28%, 54%)
CMYK	cmyk(27.5%, 21%, 0%, 45.9%)
CIE-LAB	lab(46.29, 3.58, -17.04)
CIE-LCH	lch(46.29, 17.41, 281.86°)
OKLab	oklab(53.82% 0.0011 -0.0468)
OKLCH	oklch(53.82% 0.047 271.3)
XYZ	xyz(15.3104, 15.4811, 26.2213)
Luminance	0.1548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646D8A #8A8164

analogous

#64808A #646D8A #6E648A

triadic

#646D8A #8A646D #6D8A64

tetradic

#646D8A #8A6480 #8A8164 #648A6E

square

#646D8A #8A6480 #8A8164 #648A6E

split-complementary

#646D8A #8A6E64 #808A64

monochromatic

#313543 #4A5167 #646D8A #858DA6 #A8AEC0

Accessibility & contrast

On white

5.13

#646D8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#646D8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646D8A

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646D8A	#FFFFFF	#000000	##FFFFFF
##646D8A	1.00	5.13	4.10	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#646F8B

Deuteranopia (green-blind)

#616C89

Tritanopia (blue-blind)

#5A7377

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646d8a;
/* rgb */ color: rgb(100, 109, 138);
/* oklch */ color: oklch(53.8% 0.047 271.3);

Tailwind

colors: {
  custom: {
    50: '#9196ac',
    500: '#646d8a',
    950: '#000000',
  },
}

SCSS

$custom: #646d8a;
$custom-light: #9196ac;
$custom-dark: #000000;

JSON

{
  "hex": "#646d8a",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 138
  },
  "hsl": {
    "h": 225.789,
    "s": 15.966,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53819,
    "c": 0.04683,
    "h": 271.3
  },
  "luminance": 0.15482
}

Semantic roles & 50–950 ramp

primary

#646D8A

secondary

#AFAA9B

accent

#A76FB9

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0D0D10

muted

#7D7E7F

Preview Lab

Preview with #646D8A

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

Preview Lab → · Contrast checker → · Palette generator →