#645BC4#645BC4

#645BC4 is a mid, vivid blue. Relative luminance 0.142; OKLCH L 53.4% C 0.158 H 283.5°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#645BC4
RGB	rgb(100, 91, 196)
HSL	hsl(245, 47%, 56%)
HSV	hsv(245, 54%, 77%)
CMYK	cmyk(49%, 53.6%, 0%, 23.1%)
CIE-LAB	lab(44.48, 31.43, -53.98)
CIE-LCH	lch(44.48, 62.46, 300.21°)
OKLab	oklab(53.41% 0.037 -0.154)
OKLCH	oklch(53.41% 0.158 283.5)
XYZ	xyz(18.9574, 14.1761, 53.9512)
Luminance	0.1418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BC4 #BBC45B

analogous

#5B87C4 #645BC4 #995BC4

triadic

#645BC4 #C4645B #5BC464

tetradic

#645BC4 #C45B87 #BBC45B #5BC499

square

#645BC4 #C45B87 #BBC45B #5BC499

split-complementary

#645BC4 #C4995B #87C45B

monochromatic

#322C79 #453CA6 #645BC4 #8F88D4 #B9B5E4

Accessibility & contrast

On white

5.48

#645BC4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.84

#645BC4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BC4

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BC4	#FFFFFF	#000000	##FFFFFF
##645BC4	1.00	5.48	3.84	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.84	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#236DC8

Deuteranopia (green-blind)

#1B66C2

Tritanopia (blue-blind)

#417287

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #645bc4;
/* rgb */ color: rgb(100, 91, 196);
/* oklch */ color: oklch(53.4% 0.158 283.5);

Tailwind

colors: {
  custom: {
    50: '#9789d6',
    500: '#645bc4',
    950: '#000000',
  },
}

SCSS

$custom: #645bc4;
$custom-light: #9789d6;
$custom-dark: #000000;

JSON

{
  "hex": "#645bc4",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 196
  },
  "hsl": {
    "h": 245.143,
    "s": 47.085,
    "l": 56.275
  },
  "oklch": {
    "l": 0.53412,
    "c": 0.15837,
    "h": 283.5
  },
  "luminance": 0.14177
}

Semantic roles & 50–950 ramp

primary

#645BC4

secondary

#CFD3A8

accent

#D751CB

background

#F9F8FD

surface

#F2F0FA

border

#CCCBD3

text

#0E0B14

muted

#7E7C83

Preview Lab

Preview with #645BC4

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

Preview Lab → · Contrast checker → · Palette generator →