#646B8A#646B8A

#646B8A is a mid, muted blue. Relative luminance 0.151; OKLCH L 53.4% C 0.049 H 274.7°. Best body text is #FFFFFF at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#646B8A
RGB	rgb(100, 107, 138)
HSL	hsl(229, 16%, 47%)
HSV	hsv(229, 28%, 54%)
CMYK	cmyk(27.5%, 22.5%, 0%, 45.9%)
CIE-LAB	lab(45.72, 4.78, -17.91)
CIE-LCH	lch(45.72, 18.54, 284.95°)
OKLab	oklab(53.37% 0.0041 -0.0493)
OKLCH	oklch(53.37% 0.049 274.7)
XYZ	xyz(15.0994, 15.0593, 26.1510)
Luminance	0.1506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B8A #8A8364

analogous

#647E8A #646B8A #70648A

triadic

#646B8A #8A646B #6B8A64

tetradic

#646B8A #8A647E #8A8364 #648A70

square

#646B8A #8A647E #8A8364 #648A70

split-complementary

#646B8A #8A7064 #7E8A64

monochromatic

#313443 #4A4F67 #646B8A #858BA6 #A8ADC0

Accessibility & contrast

On white

5.23

#646B8A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#646B8A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B8A

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B8A	#FFFFFF	#000000	##FFFFFF
##646B8A	1.00	5.23	4.01	5.23
#FFFFFF	5.23	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#626E8B

Deuteranopia (green-blind)

#5F6B89

Tritanopia (blue-blind)

#5A7175

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #646b8a;
/* rgb */ color: rgb(100, 107, 138);
/* oklch */ color: oklch(53.4% 0.049 274.7);

Tailwind

colors: {
  custom: {
    50: '#9195ac',
    500: '#646b8a',
    950: '#000000',
  },
}

SCSS

$custom: #646b8a;
$custom-light: #9195ac;
$custom-dark: #000000;

JSON

{
  "hex": "#646b8a",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 138
  },
  "hsl": {
    "h": 228.947,
    "s": 15.966,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53373,
    "c": 0.04944,
    "h": 274.7
  },
  "luminance": 0.1506
}

Semantic roles & 50–950 ramp

primary

#646B8A

secondary

#AFAB9B

accent

#AB6FB9

background

#F8F9FA

surface

#F0F1F4

border

#CBCBCE

text

#0D0D10

muted

#7D7E7F

Preview Lab

Preview with #646B8A

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

Preview Lab → · Contrast checker → · Palette generator →