#646F8A#646F8A

#646F8A is a mid, muted blue. Relative luminance 0.159; OKLCH L 54.3% C 0.044 H 267.6°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#646F8A
RGB	rgb(100, 111, 138)
HSL	hsl(223, 16%, 47%)
HSV	hsv(223, 28%, 54%)
CMYK	cmyk(27.5%, 19.6%, 0%, 45.9%)
CIE-LAB	lab(46.86, 2.38, -16.17)
CIE-LCH	lch(46.86, 16.34, 278.37°)
OKLab	oklab(54.27% -0.0019 -0.0444)
OKLCH	oklch(54.27% 0.044 267.6)
XYZ	xyz(15.5262, 15.9127, 26.2933)
Luminance	0.1591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646F8A #8A7F64

analogous

#64828A #646F8A #6C648A

triadic

#646F8A #8A646F #6F8A64

tetradic

#646F8A #8A6482 #8A7F64 #648A6C

square

#646F8A #8A6482 #8A7F64 #648A6C

split-complementary

#646F8A #8A6C64 #828A64

monochromatic

#313643 #4A5267 #646F8A #858FA6 #A8AFC0

Accessibility & contrast

On white

5.02

#646F8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.18

#646F8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646F8A

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646F8A	#FFFFFF	#000000	##FFFFFF
##646F8A	1.00	5.02	4.18	5.02
#FFFFFF	5.02	1.00	21.00	1.00
#000000	4.18	21.00	1.00	21.00
##FFFFFF	5.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#67718B

Deuteranopia (green-blind)

#636E89

Tritanopia (blue-blind)

#5A7478

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #646f8a;
/* rgb */ color: rgb(100, 111, 138);
/* oklch */ color: oklch(54.3% 0.044 267.6);

Tailwind

colors: {
  custom: {
    50: '#9198ac',
    500: '#646f8a',
    950: '#000000',
  },
}

SCSS

$custom: #646f8a;
$custom-light: #9198ac;
$custom-dark: #000000;

JSON

{
  "hex": "#646f8a",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 138
  },
  "hsl": {
    "h": 222.632,
    "s": 15.966,
    "l": 46.667
  },
  "oklch": {
    "l": 0.54267,
    "c": 0.04441,
    "h": 267.6
  },
  "luminance": 0.15913
}

Semantic roles & 50–950 ramp

primary

#646F8A

secondary

#AFA99B

accent

#A36FB9

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0D0D10

muted

#7D7E7F

Preview Lab

Preview with #646F8A

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

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