#646F83#646F83

#646F83 is a mid, muted blue. Relative luminance 0.157; OKLCH L 54.0% C 0.034 H 262.4°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#646F83
RGB	rgb(100, 111, 131)
HSL	hsl(219, 13%, 45%)
HSV	hsv(219, 24%, 51%)
CMYK	cmyk(23.7%, 15.3%, 0%, 48.6%)
CIE-LAB	lab(46.60, 0.59, -12.39)
CIE-LCH	lch(46.60, 12.41, 272.71°)
OKLab	oklab(53.98% -0.0045 -0.0338)
OKLCH	oklch(53.98% 0.034 262.4)
XYZ	xyz(15.0356, 15.7165, 23.7097)
Luminance	0.1572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646F83 #837864

analogous

#647E83 #646F83 #686483

triadic

#646F83 #83646F #6F8364

tetradic

#646F83 #83647E #837864 #648368

square

#646F83 #83647E #837864 #648368

split-complementary

#646F83 #836864 #7E8364

monochromatic

#2F343E #4A5260 #646F83 #838EA1 #A6AEBB

Accessibility & contrast

On white

5.07

#646F83 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.14

#646F83 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646F83

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646F83	#FFFFFF	#000000	##FFFFFF
##646F83	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)

#697084

Deuteranopia (green-blind)

#666D83

Tritanopia (blue-blind)

#5C7375

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646f83;
/* rgb */ color: rgb(100, 111, 131);
/* oklch */ color: oklch(54.0% 0.034 262.4);

Tailwind

colors: {
  custom: {
    50: '#9098a7',
    500: '#646f83',
    950: '#000000',
  },
}

SCSS

$custom: #646f83;
$custom-light: #9098a7;
$custom-dark: #000000;

JSON

{
  "hex": "#646f83",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 131
  },
  "hsl": {
    "h": 218.71,
    "s": 13.42,
    "l": 45.294
  },
  "oklch": {
    "l": 0.53978,
    "c": 0.03411,
    "h": 262.4
  },
  "luminance": 0.15717
}

Semantic roles & 50–950 ramp

primary

#646F83

secondary

#AAA499

accent

#9E72B6

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0C0D0F

muted

#7D7E7F

Preview Lab

Preview with #646F83

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

Preview Lab → · Contrast checker → · Palette generator →