#646CDF#646CDF

#646CDF is a mid, vivid blue. Relative luminance 0.188; OKLCH L 58.4% C 0.172 H 276.7°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#646CDF
RGB	rgb(100, 108, 223)
HSL	hsl(236, 66%, 63%)
HSV	hsv(236, 55%, 87%)
CMYK	cmyk(55.2%, 51.6%, 0%, 12.5%)
CIE-LAB	lab(50.41, 29.50, -59.88)
CIE-LCH	lch(50.41, 66.75, 296.23°)
OKLab	oklab(58.4% 0.02 -0.1712)
OKLCH	oklch(58.4% 0.172 276.7)
XYZ	xyz(23.9331, 18.7605, 72.1577)
Luminance	0.1876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CDF #DFD764

analogous

#64A9DF #646CDF #9A64DF

triadic

#646CDF #DF646C #6CDF64

tetradic

#646CDF #DF64A9 #DFD764 #64DF9A

square

#646CDF #DF64A9 #DFD764 #64DF9A

split-complementary

#646CDF #DF9A64 #A9DF64

monochromatic

#222BA6 #313CD5 #646CDF #979CE9 #C9CCF4

Accessibility & contrast

On white

4.42

#646CDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#646CDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646CDF

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CDF	#FFFFFF	#000000	##000000
##646CDF	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D7DE3

Deuteranopia (green-blind)

#1573DD

Tritanopia (blue-blind)

#23869B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #646cdf;
/* rgb */ color: rgb(100, 108, 223);
/* oklch */ color: oklch(58.4% 0.172 276.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#646cdf",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 223
  },
  "hsl": {
    "h": 236.098,
    "s": 65.775,
    "l": 63.333
  },
  "oklch": {
    "l": 0.58399,
    "c": 0.17236,
    "h": 276.7
  },
  "luminance": 0.18762
}

Semantic roles & 50–950 ramp

primary

#646CDF

secondary

#E5E2B9

accent

#C218CE

background

#F9F9FE

surface

#F2F1FD

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646CDF

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

Preview Lab → · Contrast checker → · Palette generator →