#646DDB#646DDB

#646DDB is a mid, vivid blue. Relative luminance 0.188; OKLCH L 58.3% C 0.166 H 276.5°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#646DDB
RGB	rgb(100, 109, 219)
HSL	hsl(235, 62%, 63%)
HSV	hsv(235, 54%, 86%)
CMYK	cmyk(54.3%, 50.2%, 0%, 14.1%)
CIE-LAB	lab(50.40, 27.62, -57.62)
CIE-LCH	lch(50.40, 63.90, 295.61°)
OKLab	oklab(58.32% 0.0186 -0.1645)
OKLCH	oklch(58.32% 0.166 276.5)
XYZ	xyz(23.5063, 18.7595, 69.3864)
Luminance	0.1876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DDB #DBD264

analogous

#64A9DB #646DDB #9664DB

triadic

#646DDB #DB646D #6DDB64

tetradic

#646DDB #DB64A9 #DBD264 #64DB96

square

#646DDB #DB64A9 #DBD264 #64DB96

split-complementary

#646DDB #DB9664 #A9DB64

monochromatic

#252EA0 #323ECF #646DDB #969CE7 #C7CBF2

Accessibility & contrast

On white

4.42

#646DDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#646DDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DDB

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DDB	#FFFFFF	#000000	##000000
##646DDB	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)

#357DDF

Deuteranopia (green-blind)

#2373D9

Tritanopia (blue-blind)

#28869A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #646ddb;
/* rgb */ color: rgb(100, 109, 219);
/* oklch */ color: oklch(58.3% 0.166 276.5);

Tailwind

colors: {
  custom: {
    50: '#9996e7',
    500: '#646ddb',
    950: '#000000',
  },
}

SCSS

$custom: #646ddb;
$custom-light: #9996e7;
$custom-dark: #000000;

JSON

{
  "hex": "#646ddb",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 219
  },
  "hsl": {
    "h": 235.462,
    "s": 62.304,
    "l": 62.549
  },
  "oklch": {
    "l": 0.58318,
    "c": 0.16559,
    "h": 276.5
  },
  "luminance": 0.18761
}

Semantic roles & 50–950 ramp

primary

#646DDB

secondary

#E3E0B8

accent

#BD1BCA

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646DDB

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

Preview Lab → · Contrast checker → · Palette generator →