#646E83#646E83

#646E83 is a mid, muted blue. Relative luminance 0.155; OKLCH L 53.8% C 0.035 H 265.1°. Best body text is #FFFFFF at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#646E83
RGB	rgb(100, 110, 131)
HSL	hsl(221, 13%, 45%)
HSV	hsv(221, 24%, 51%)
CMYK	cmyk(23.7%, 16%, 0%, 48.6%)
CIE-LAB	lab(46.31, 1.18, -12.83)
CIE-LCH	lch(46.31, 12.88, 275.26°)
OKLab	oklab(53.75% -0.003 -0.035)
OKLCH	oklch(53.75% 0.035 265.1)
XYZ	xyz(14.9271, 15.4995, 23.6736)
Luminance	0.1550 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646E83 #837964

analogous

#647D83 #646E83 #696483

triadic

#646E83 #83646E #6E8364

tetradic

#646E83 #83647D #837964 #648369

square

#646E83 #83647D #837964 #648369

split-complementary

#646E83 #836964 #7D8364

monochromatic

#2F343E #4A5160 #646E83 #838DA1 #A6ADBB

Accessibility & contrast

On white

5.12

#646E83 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#646E83 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646E83

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646E83	#FFFFFF	#000000	##FFFFFF
##646E83	1.00	5.12	4.10	5.12
#FFFFFF	5.12	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#686F84

Deuteranopia (green-blind)

#656C82

Tritanopia (blue-blind)

#5C7275

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646e83;
/* rgb */ color: rgb(100, 110, 131);
/* oklch */ color: oklch(53.8% 0.035 265.1);

Tailwind

colors: {
  custom: {
    50: '#9097a7',
    500: '#646e83',
    950: '#000000',
  },
}

SCSS

$custom: #646e83;
$custom-light: #9097a7;
$custom-dark: #000000;

JSON

{
  "hex": "#646e83",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 131
  },
  "hsl": {
    "h": 220.645,
    "s": 13.42,
    "l": 45.294
  },
  "oklch": {
    "l": 0.53751,
    "c": 0.03515,
    "h": 265.1
  },
  "luminance": 0.155
}

Semantic roles & 50–950 ramp

primary

#646E83

secondary

#AAA599

accent

#A072B6

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0C0D0F

muted

#7D7E7F

Preview Lab

Preview with #646E83

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

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