#646AD4#646AD4

#646AD4 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.3% C 0.160 H 277.6°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#646AD4
RGB	rgb(100, 106, 212)
HSL	hsl(237, 57%, 61%)
HSV	hsv(237, 53%, 83%)
CMYK	cmyk(52.8%, 50%, 0%, 16.9%)
CIE-LAB	lab(49.22, 27.24, -55.55)
CIE-LCH	lch(49.22, 61.87, 296.12°)
OKLab	oklab(57.28% 0.0213 -0.1585)
OKLCH	oklch(57.28% 0.16 277.6)
XYZ	xyz(22.2895, 17.7695, 64.5299)
Luminance	0.1777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646AD4 #D4CE64

analogous

#64A2D4 #646AD4 #9664D4

triadic

#646AD4 #D4646A #6AD464

tetradic

#646AD4 #D464A2 #D4CE64 #64D496

square

#646AD4 #D464A2 #D4CE64 #64D496

split-complementary

#646AD4 #D49664 #A2D464

monochromatic

#292F94 #363EC4 #646AD4 #9498E1 #C4C6EF

Accessibility & contrast

On white

4.61

#646AD4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#646AD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646AD4

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646AD4	#FFFFFF	#000000	##FFFFFF
##646AD4	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#357AD8

Deuteranopia (green-blind)

#2871D2

Tritanopia (blue-blind)

#318195

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646ad4;
/* rgb */ color: rgb(100, 106, 212);
/* oklch */ color: oklch(57.3% 0.160 277.6);

Tailwind

colors: {
  custom: {
    50: '#9894e2',
    500: '#646ad4',
    950: '#000000',
  },
}

SCSS

$custom: #646ad4;
$custom-light: #9894e2;
$custom-dark: #000000;

JSON

{
  "hex": "#646ad4",
  "rgb": {
    "r": 100,
    "g": 106,
    "b": 212
  },
  "hsl": {
    "h": 236.786,
    "s": 56.566,
    "l": 61.176
  },
  "oklch": {
    "l": 0.57282,
    "c": 0.15993,
    "h": 277.6
  },
  "luminance": 0.17771
}

Semantic roles & 50–950 ramp

primary

#646AD4

secondary

#DFDDB5

accent

#BB21C4

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646AD4

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

Preview Lab → · Contrast checker → · Palette generator →