#646BBC#646BBC

#646BBC is a mid, vivid blue. Relative luminance 0.169; OKLCH L 56.0% C 0.125 H 277.8°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#646BBC
RGB	rgb(100, 107, 188)
HSL	hsl(235, 40%, 56%)
HSV	hsv(235, 47%, 74%)
CMYK	cmyk(46.8%, 43.1%, 0%, 26.3%)
CIE-LAB	lab(48.08, 19.15, -43.61)
CIE-LCH	lch(48.08, 47.62, 293.70°)
OKLab	oklab(55.97% 0.017 -0.1234)
OKLCH	oklch(55.97% 0.125 277.8)
XYZ	xyz(19.5875, 16.8545, 49.7883)
Luminance	0.1686 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BBC #BCB564

analogous

#6497BC #646BBC #8964BC

triadic

#646BBC #BC646B #6BBC64

tetradic

#646BBC #BC6497 #BCB564 #64BC89

square

#646BBC #BC6497 #BCB564 #64BC89

split-complementary

#646BBC #BC8964 #97BC64

monochromatic

#323774 #444C9E #646BBC #8F94CE #B9BDE1

Accessibility & contrast

On white

4.80

#646BBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#646BBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BBC

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BBC	#FFFFFF	#000000	##FFFFFF
##646BBC	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B76BF

Deuteranopia (green-blind)

#456FBA

Tritanopia (blue-blind)

#457C8A

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bbc;
/* rgb */ color: rgb(100, 107, 188);
/* oklch */ color: oklch(56.0% 0.125 277.8);

Tailwind

colors: {
  custom: {
    50: '#9595d0',
    500: '#646bbc',
    950: '#000000',
  },
}

SCSS

$custom: #646bbc;
$custom-light: #9595d0;
$custom-dark: #000000;

JSON

{
  "hex": "#646bbc",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 188
  },
  "hsl": {
    "h": 235.227,
    "s": 39.64,
    "l": 56.471
  },
  "oklch": {
    "l": 0.55967,
    "c": 0.1246,
    "h": 277.8
  },
  "luminance": 0.16856
}

Semantic roles & 50–950 ramp

primary

#646BBC

secondary

#D0CDAC

accent

#C658D0

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646BBC

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

Preview Lab → · Contrast checker → · Palette generator →