#646E8A#646E8A

#646E8A is a mid, muted blue. Relative luminance 0.157; OKLCH L 54.0% C 0.046 H 269.5°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#646E8A
RGB	rgb(100, 110, 138)
HSL	hsl(224, 16%, 47%)
HSV	hsv(224, 28%, 54%)
CMYK	cmyk(27.5%, 20.3%, 0%, 45.9%)
CIE-LAB	lab(46.57, 2.98, -16.60)
CIE-LCH	lch(46.57, 16.87, 280.16°)
OKLab	oklab(54.04% -0.0004 -0.0456)
OKLCH	oklch(54.04% 0.046 269.5)
XYZ	xyz(15.4177, 15.6957, 26.2571)
Luminance	0.1570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646E8A #8A8064

analogous

#64818A #646E8A #6D648A

triadic

#646E8A #8A646E #6E8A64

tetradic

#646E8A #8A6481 #8A8064 #648A6D

square

#646E8A #8A6481 #8A8064 #648A6D

split-complementary

#646E8A #8A6D64 #818A64

monochromatic

#313543 #4A5267 #646E8A #858EA6 #A8AFC0

Accessibility & contrast

On white

5.07

#646E8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.14

#646E8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646E8A

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646E8A	#FFFFFF	#000000	##FFFFFF
##646E8A	1.00	5.07	4.14	5.07
#FFFFFF	5.07	1.00	21.00	1.00
#000000	4.14	21.00	1.00	21.00
##FFFFFF	5.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#65708B

Deuteranopia (green-blind)

#626D89

Tritanopia (blue-blind)

#5A7377

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646e8a;
/* rgb */ color: rgb(100, 110, 138);
/* oklch */ color: oklch(54.0% 0.046 269.5);

Tailwind

colors: {
  custom: {
    50: '#9197ac',
    500: '#646e8a',
    950: '#000000',
  },
}

SCSS

$custom: #646e8a;
$custom-light: #9197ac;
$custom-dark: #000000;

JSON

{
  "hex": "#646e8a",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 138
  },
  "hsl": {
    "h": 224.211,
    "s": 15.966,
    "l": 46.667
  },
  "oklch": {
    "l": 0.54043,
    "c": 0.04559,
    "h": 269.5
  },
  "luminance": 0.15696
}

Semantic roles & 50–950 ramp

primary

#646E8A

secondary

#AFAA9B

accent

#A56FB9

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0D0D10

muted

#7D7E7F

Preview Lab

Preview with #646E8A

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

Preview Lab → · Contrast checker → · Palette generator →