#646C80#646C80

#646C80 is a mid, muted blue. Relative luminance 0.150; OKLCH L 53.2% C 0.033 H 268.1°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#646C80
RGB	rgb(100, 108, 128)
HSL	hsl(223, 12%, 45%)
HSV	hsv(223, 22%, 50%)
CMYK	cmyk(21.9%, 15.6%, 0%, 49.8%)
CIE-LAB	lab(45.62, 1.63, -12.08)
CIE-LCH	lch(45.62, 12.18, 277.67°)
OKLab	oklab(53.18% -0.0011 -0.0329)
OKLCH	oklch(53.18% 0.033 268.1)
XYZ	xyz(14.5134, 14.9926, 22.5471)
Luminance	0.1499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C80 #807864

analogous

#647A80 #646C80 #6A6480

triadic

#646C80 #80646C #6C8064

tetradic

#646C80 #80647A #807864 #64806A

square

#646C80 #80647A #807864 #64806A

split-complementary

#646C80 #806A64 #7A8064

monochromatic

#2E323B #494F5E #646C80 #838B9E #A5ABB9

Accessibility & contrast

On white

5.25

#646C80 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#646C80 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C80

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C80	#FFFFFF	#000000	##FFFFFF
##646C80	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#666D81

Deuteranopia (green-blind)

#646B80

Tritanopia (blue-blind)

#5D7073

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #646c80;
/* rgb */ color: rgb(100, 108, 128);
/* oklch */ color: oklch(53.2% 0.033 268.1);

Tailwind

colors: {
  custom: {
    50: '#9096a4',
    500: '#646c80',
    950: '#000000',
  },
}

SCSS

$custom: #646c80;
$custom-light: #9096a4;
$custom-dark: #000000;

JSON

{
  "hex": "#646c80",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 128
  },
  "hsl": {
    "h": 222.857,
    "s": 12.281,
    "l": 44.706
  },
  "oklch": {
    "l": 0.53177,
    "c": 0.03293,
    "h": 268.1
  },
  "luminance": 0.14993
}

Semantic roles & 50–950 ramp

primary

#646C80

secondary

#A8A398

accent

#A273B5

background

#F8F9FA

surface

#F0F1F4

border

#CBCBCE

text

#0C0D0F

muted

#7D7E7F

Preview Lab

Preview with #646C80

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

Preview Lab → · Contrast checker → · Palette generator →