#646DD4#646DD4

#646DD4 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.9% C 0.156 H 276.6°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#646DD4
RGB	rgb(100, 109, 212)
HSL	hsl(235, 57%, 61%)
HSV	hsv(235, 53%, 83%)
CMYK	cmyk(52.8%, 48.6%, 0%, 16.9%)
CIE-LAB	lab(49.98, 25.40, -54.33)
CIE-LCH	lch(49.98, 59.98, 295.06°)
OKLab	oklab(57.86% 0.0179 -0.1549)
OKLCH	oklch(57.86% 0.156 276.6)
XYZ	xyz(22.6041, 18.3986, 64.6348)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DD4 #D4CB64

analogous

#64A5D4 #646DD4 #9364D4

triadic

#646DD4 #D4646D #6DD464

tetradic

#646DD4 #D464A5 #D4CB64 #64D493

square

#646DD4 #D464A5 #D4CB64 #64D493

split-complementary

#646DD4 #D49364 #A5D464

monochromatic

#293294 #3642C4 #646DD4 #949AE1 #C4C7EF

Accessibility & contrast

On white

4.49

#646DD4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#646DD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DD4

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DD4	#FFFFFF	#000000	##000000
##646DD4	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C7CD8

Deuteranopia (green-blind)

#2F72D2

Tritanopia (blue-blind)

#318496

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646dd4;
/* rgb */ color: rgb(100, 109, 212);
/* oklch */ color: oklch(57.9% 0.156 276.6);

Tailwind

colors: {
  custom: {
    50: '#9896e2',
    500: '#646dd4',
    950: '#000000',
  },
}

SCSS

$custom: #646dd4;
$custom-light: #9896e2;
$custom-dark: #000000;

JSON

{
  "hex": "#646dd4",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 212
  },
  "hsl": {
    "h": 235.179,
    "s": 56.566,
    "l": 61.176
  },
  "oklch": {
    "l": 0.57856,
    "c": 0.15593,
    "h": 276.6
  },
  "luminance": 0.184
}

Semantic roles & 50–950 ramp

primary

#646DD4

secondary

#DFDCB5

accent

#B721C4

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646DD4

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

Preview Lab → · Contrast checker → · Palette generator →