#645BDB#645BDB

#645BDB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 55.1% C 0.189 H 281.4°. Best body text is #FFFFFF at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#645BDB
RGB	rgb(100, 91, 219)
HSL	hsl(244, 64%, 61%)
HSV	hsv(244, 58%, 86%)
CMYK	cmyk(54.3%, 58.4%, 0%, 14.1%)
CIE-LAB	lab(46.05, 38.51, -64.65)
CIE-LCH	lch(46.05, 75.25, 300.78°)
OKLab	oklab(55.07% 0.0373 -0.1854)
OKLCH	oklch(55.07% 0.189 281.4)
XYZ	xyz(21.7788, 15.3046, 68.8106)
Luminance	0.1531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BDB #D2DB5B

analogous

#5B92DB #645BDB #A45BDB

triadic

#645BDB #DB645B #5BDB64

tetradic

#645BDB #DB5B92 #D2DB5B #5BDBA4

square

#645BDB #DB5B92 #D2DB5B #5BDBA4

split-complementary

#645BDB #DBA45B #92DB5B

monochromatic

#2A229A #382DCC #645BDB #938DE6 #C3BFF1

Accessibility & contrast

On white

5.17

#645BDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#645BDB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BDB

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BDB	#FFFFFF	#000000	##FFFFFF
##645BDB	1.00	5.17	4.06	5.17
#FFFFFF	5.17	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0072DF

Deuteranopia (green-blind)

#0068D8

Tritanopia (blue-blind)

#2C7992

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #645bdb;
/* rgb */ color: rgb(100, 91, 219);
/* oklch */ color: oklch(55.1% 0.189 281.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#645bdb",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 219
  },
  "hsl": {
    "h": 244.219,
    "s": 64,
    "l": 60.784
  },
  "oklch": {
    "l": 0.55069,
    "c": 0.18908,
    "h": 281.4
  },
  "luminance": 0.15306
}

Semantic roles & 50–950 ramp

primary

#645BDB

secondary

#DEE1B1

accent

#CC1ABF

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0B16

muted

#7F7C84

Preview Lab

Preview with #645BDB

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

Preview Lab → · Contrast checker → · Palette generator →