#646DDF#646DDF

#646DDF is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.6% C 0.171 H 276.4°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#646DDF
RGB	rgb(100, 109, 223)
HSL	hsl(236, 66%, 63%)
HSV	hsv(236, 55%, 87%)
CMYK	cmyk(55.2%, 51.1%, 0%, 12.5%)
CIE-LAB	lab(50.66, 28.89, -59.48)
CIE-LCH	lch(50.66, 66.12, 295.91°)
OKLab	oklab(58.59% 0.0189 -0.17)
OKLCH	oklch(58.59% 0.171 276.4)
XYZ	xyz(24.0392, 18.9727, 72.1931)
Luminance	0.1897 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DDF #DFD664

analogous

#64AADF #646DDF #9864DF

triadic

#646DDF #DF646D #6DDF64

tetradic

#646DDF #DF64AA #DFD664 #64DF98

square

#646DDF #DF64AA #DFD664 #64DF98

split-complementary

#646DDF #DF9864 #AADF64

monochromatic

#222CA6 #313DD5 #646DDF #979DE9 #C9CDF4

Accessibility & contrast

On white

4.38

#646DDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#646DDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DDF

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DDF	#FFFFFF	#000000	##000000
##646DDF	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#307EE3

Deuteranopia (green-blind)

#1A74DD

Tritanopia (blue-blind)

#22879C

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #646ddf;
/* rgb */ color: rgb(100, 109, 223);
/* oklch */ color: oklch(58.6% 0.171 276.4);

Tailwind

colors: {
  custom: {
    50: '#9996ea',
    500: '#646ddf',
    950: '#000000',
  },
}

SCSS

$custom: #646ddf;
$custom-light: #9996ea;
$custom-dark: #000000;

JSON

{
  "hex": "#646ddf",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 223
  },
  "hsl": {
    "h": 235.61,
    "s": 65.775,
    "l": 63.333
  },
  "oklch": {
    "l": 0.58587,
    "c": 0.17106,
    "h": 276.4
  },
  "luminance": 0.18974
}

Semantic roles & 50–950 ramp

primary

#646DDF

secondary

#E5E2B9

accent

#C018CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646DDF

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

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