#646C7C#646C7C

#646C7C is a mid, muted blue. Relative luminance 0.149; OKLCH L 53.0% C 0.027 H 264.3°. Best body text is #FFFFFF at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#646C7C
RGB	rgb(100, 108, 124)
HSL	hsl(220, 11%, 44%)
HSV	hsv(220, 19%, 49%)
CMYK	cmyk(19.4%, 12.9%, 0%, 51.4%)
CIE-LAB	lab(45.48, 0.64, -9.89)
CIE-LCH	lch(45.48, 9.91, 273.72°)
OKLab	oklab(53.02% -0.0027 -0.0269)
OKLCH	oklch(53.02% 0.027 264.3)
XYZ	xyz(14.2553, 14.8894, 21.1878)
Luminance	0.1489 (WCAG relative)
Temperature	neutral
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C7C #7C7464

analogous

#64787C #646C7C #68647C

triadic

#646C7C #7C646C #6C7C64

tetradic

#646C7C #7C6478 #7C7464 #647C68

square

#646C7C #7C6478 #7C7464 #647C68

split-complementary

#646C7C #7C6864 #787C64

monochromatic

#2D3138 #494E5A #646C7C #838B9B #A4AAB6

Accessibility & contrast

On white

5.28

#646C7C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#646C7C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C7C

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C7C	#FFFFFF	#000000	##FFFFFF
##646C7C	1.00	5.28	3.98	5.28
#FFFFFF	5.28	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#676D7D

Deuteranopia (green-blind)

#656B7C

Tritanopia (blue-blind)

#5E6F71

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #646c7c;
/* rgb */ color: rgb(100, 108, 124);
/* oklch */ color: oklch(53.0% 0.027 264.3);

Tailwind

colors: {
  custom: {
    50: '#9096a2',
    500: '#646c7c',
    950: '#000000',
  },
}

SCSS

$custom: #646c7c;
$custom-light: #9096a2;
$custom-dark: #000000;

JSON

{
  "hex": "#646c7c",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 124
  },
  "hsl": {
    "h": 220,
    "s": 10.714,
    "l": 43.922
  },
  "oklch": {
    "l": 0.53019,
    "c": 0.02699,
    "h": 264.3
  },
  "luminance": 0.1489
}

Semantic roles & 50–950 ramp

primary

#646C7C

secondary

#A5A097

accent

#9E74B4

background

#F8F9F9

surface

#F0F1F2

border

#CBCBCC

text

#0C0D0F

muted

#7D7E7E

Preview Lab

Preview with #646C7C

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

Preview Lab → · Contrast checker → · Palette generator →