#646C88#646C88

#646C88 is a mid, muted blue. Relative luminance 0.152; OKLCH L 53.5% C 0.045 H 272.4°. Best body text is #FFFFFF at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#646C88
RGB	rgb(100, 108, 136)
HSL	hsl(227, 15%, 46%)
HSV	hsv(227, 26%, 53%)
CMYK	cmyk(26.5%, 20.6%, 0%, 46.7%)
CIE-LAB	lab(45.92, 3.66, -16.40)
CIE-LCH	lch(45.92, 16.81, 282.57°)
OKLab	oklab(53.51% 0.0019 -0.045)
OKLCH	oklch(53.51% 0.045 272.4)
XYZ	xyz(15.0608, 15.2116, 25.4304)
Luminance	0.1521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C88 #888064

analogous

#647E88 #646C88 #6E6488

triadic

#646C88 #88646C #6C8864

tetradic

#646C88 #88647E #888064 #64886E

square

#646C88 #88647E #888064 #64886E

split-complementary

#646C88 #886E64 #7E8864

monochromatic

#303441 #4A5065 #646C88 #848CA5 #A8ADBF

Accessibility & contrast

On white

5.19

#646C88 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#646C88 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C88

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C88	#FFFFFF	#000000	##FFFFFF
##646C88	1.00	5.19	4.04	5.19
#FFFFFF	5.19	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#646E89

Deuteranopia (green-blind)

#616B87

Tritanopia (blue-blind)

#5B7175

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #646c88;
/* rgb */ color: rgb(100, 108, 136);
/* oklch */ color: oklch(53.5% 0.045 272.4);

Tailwind

colors: {
  custom: {
    50: '#9196aa',
    500: '#646c88',
    950: '#000000',
  },
}

SCSS

$custom: #646c88;
$custom-light: #9196aa;
$custom-dark: #000000;

JSON

{
  "hex": "#646c88",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 136
  },
  "hsl": {
    "h": 226.667,
    "s": 15.254,
    "l": 46.275
  },
  "oklch": {
    "l": 0.53509,
    "c": 0.04506,
    "h": 272.4
  },
  "luminance": 0.15212
}

Semantic roles & 50–950 ramp

primary

#646C88

secondary

#AEA99A

accent

#A870B8

background

#F8F9FA

surface

#F0F1F4

border

#CBCBCE

text

#0C0D10

muted

#7D7E7F

Preview Lab

Preview with #646C88

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

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