#645DDB#645DDB

#645DDB is a mid, vivid blue. Relative luminance 0.157; OKLCH L 55.4% C 0.187 H 280.9°. Best body text is #FFFFFF at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#645DDB
RGB	rgb(100, 93, 219)
HSL	hsl(243, 64%, 61%)
HSV	hsv(243, 58%, 86%)
CMYK	cmyk(54.3%, 57.5%, 0%, 14.1%)
CIE-LAB	lab(46.51, 37.32, -63.90)
CIE-LCH	lch(46.51, 74.00, 300.29°)
OKLab	oklab(55.41% 0.0353 -0.1831)
OKLCH	oklch(55.41% 0.187 280.9)
XYZ	xyz(21.9521, 15.6511, 68.8683)
Luminance	0.1565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645DDB #D4DB5D

analogous

#5D95DB #645DDB #A35DDB

triadic

#645DDB #DB645D #5DDB64

tetradic

#645DDB #DB5D95 #D4DB5D #5DDBA3

square

#645DDB #DB5D95 #D4DB5D #5DDBA3

split-complementary

#645DDB #DBA35D #95DB5D

monochromatic

#29229B #362ECD #645DDB #948FE6 #C4C1F1

Accessibility & contrast

On white

5.08

#645DDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.13

#645DDB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645DDB

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645DDB	#FFFFFF	#000000	##FFFFFF
##645DDB	1.00	5.08	4.13	5.08
#FFFFFF	5.08	1.00	21.00	1.00
#000000	4.13	21.00	1.00	21.00
##FFFFFF	5.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0073DF

Deuteranopia (green-blind)

#006AD8

Tritanopia (blue-blind)

#2C7B93

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #645ddb;
/* rgb */ color: rgb(100, 93, 219);
/* oklch */ color: oklch(55.4% 0.187 280.9);

Tailwind

colors: {
  custom: {
    50: '#9a8be7',
    500: '#645ddb',
    950: '#000000',
  },
}

SCSS

$custom: #645ddb;
$custom-light: #9a8be7;
$custom-dark: #000000;

JSON

{
  "hex": "#645ddb",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 219
  },
  "hsl": {
    "h": 243.333,
    "s": 63.636,
    "l": 61.176
  },
  "oklch": {
    "l": 0.55412,
    "c": 0.18651,
    "h": 280.9
  },
  "luminance": 0.15652
}

Semantic roles & 50–950 ramp

primary

#645DDB

secondary

#DFE2B2

accent

#CB1AC2

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0C16

muted

#7F7D84

Preview Lab

Preview with #645DDB

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

Preview Lab → · Contrast checker → · Palette generator →