#646C8A#646C8A

#646C8A is a mid, muted blue. Relative luminance 0.153; OKLCH L 53.6% C 0.048 H 273.1°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#646C8A
RGB	rgb(100, 108, 138)
HSL	hsl(227, 16%, 47%)
HSV	hsv(227, 28%, 54%)
CMYK	cmyk(27.5%, 21.7%, 0%, 45.9%)
CIE-LAB	lab(46.00, 4.18, -17.48)
CIE-LCH	lch(46.00, 17.97, 283.45°)
OKLab	oklab(53.6% 0.0026 -0.048)
OKLCH	oklch(53.6% 0.048 273.1)
XYZ	xyz(15.2043, 15.2690, 26.1860)
Luminance	0.1527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C8A #8A8264

analogous

#647F8A #646C8A #6F648A

triadic

#646C8A #8A646C #6C8A64

tetradic

#646C8A #8A647F #8A8264 #648A6F

square

#646C8A #8A647F #8A8264 #648A6F

split-complementary

#646C8A #8A6F64 #7F8A64

monochromatic

#313443 #4A5067 #646C8A #858CA6 #A8ADC0

Accessibility & contrast

On white

5.18

#646C8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#646C8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C8A

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C8A	#FFFFFF	#000000	##FFFFFF
##646C8A	1.00	5.18	4.05	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#636F8B

Deuteranopia (green-blind)

#606C89

Tritanopia (blue-blind)

#5A7276

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #646c8a;
/* rgb */ color: rgb(100, 108, 138);
/* oklch */ color: oklch(53.6% 0.048 273.1);

Tailwind

colors: {
  custom: {
    50: '#9196ac',
    500: '#646c8a',
    950: '#000000',
  },
}

SCSS

$custom: #646c8a;
$custom-light: #9196ac;
$custom-dark: #000000;

JSON

{
  "hex": "#646c8a",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 138
  },
  "hsl": {
    "h": 227.368,
    "s": 15.966,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53596,
    "c": 0.04812,
    "h": 273.1
  },
  "luminance": 0.15269
}

Semantic roles & 50–950 ramp

primary

#646C8A

secondary

#AFAB9B

accent

#A96FB9

background

#F8F9FA

surface

#F0F1F4

border

#CBCBCE

text

#0D0D10

muted

#7D7E7F

Preview Lab

Preview with #646C8A

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

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