#645CDB#645CDB

#645CDB is a mid, vivid blue. Relative luminance 0.155; OKLCH L 55.2% C 0.188 H 281.1°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#645CDB
RGB	rgb(100, 92, 219)
HSL	hsl(244, 64%, 61%)
HSV	hsv(244, 58%, 86%)
CMYK	cmyk(54.3%, 58%, 0%, 14.1%)
CIE-LAB	lab(46.28, 37.92, -64.27)
CIE-LCH	lch(46.28, 74.62, 300.54°)
OKLab	oklab(55.24% 0.0363 -0.1843)
OKLCH	oklch(55.24% 0.188 281.1)
XYZ	xyz(21.8649, 15.4767, 68.8393)
Luminance	0.1548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CDB #D3DB5C

analogous

#5C93DB #645CDB #A45CDB

triadic

#645CDB #DB645C #5CDB64

tetradic

#645CDB #DB5C93 #D3DB5C #5CDBA4

square

#645CDB #DB5C93 #D3DB5C #5CDBA4

split-complementary

#645CDB #DBA45C #93DB5C

monochromatic

#2A229A #372DCD #645CDB #948EE6 #C3C0F1

Accessibility & contrast

On white

5.13

#645CDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#645CDB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CDB

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CDB	#FFFFFF	#000000	##FFFFFF
##645CDB	1.00	5.13	4.10	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0072DF

Deuteranopia (green-blind)

#0069D8

Tritanopia (blue-blind)

#2C7A93

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #645cdb;
/* rgb */ color: rgb(100, 92, 219);
/* oklch */ color: oklch(55.2% 0.188 281.1);

Tailwind

colors: {
  custom: {
    50: '#9a8ae7',
    500: '#645cdb',
    950: '#000000',
  },
}

SCSS

$custom: #645cdb;
$custom-light: #9a8ae7;
$custom-dark: #000000;

JSON

{
  "hex": "#645cdb",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 219
  },
  "hsl": {
    "h": 243.78,
    "s": 63.819,
    "l": 60.98
  },
  "oklch": {
    "l": 0.5524,
    "c": 0.1878,
    "h": 281.1
  },
  "luminance": 0.15478
}

Semantic roles & 50–950 ramp

primary

#645CDB

secondary

#DEE1B1

accent

#CC1AC0

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0C16

muted

#7F7D84

Preview Lab

Preview with #645CDB

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

Preview Lab → · Contrast checker → · Palette generator →