#645BDD#645BDD

#645BDD is a mid, vivid blue. Relative luminance 0.154; OKLCH L 55.2% C 0.192 H 281.2°. Best body text is #FFFFFF at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#645BDD
RGB	rgb(100, 91, 221)
HSL	hsl(244, 66%, 61%)
HSV	hsv(244, 59%, 87%)
CMYK	cmyk(54.8%, 58.8%, 0%, 13.3%)
CIE-LAB	lab(46.19, 39.13, -65.56)
CIE-LCH	lch(46.19, 76.35, 300.83°)
OKLab	oklab(55.22% 0.0372 -0.188)
OKLCH	oklch(55.22% 0.192 281.2)
XYZ	xyz(22.0437, 15.4106, 70.2056)
Luminance	0.1541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BDD #D4DD5B

analogous

#5B93DD #645BDD #A55BDD

triadic

#645BDD #DD645B #5BDD64

tetradic

#645BDD #DD5B93 #D4DD5B #5BDDA5

square

#645BDD #DD5B93 #D4DD5B #5BDDA5

split-complementary

#645BDD #DDA55B #93DD5B

monochromatic

#29219D #362BD0 #645BDD #948EE8 #C4C0F2

Accessibility & contrast

On white

5.14

#645BDD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.08

#645BDD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BDD

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BDD	#FFFFFF	#000000	##FFFFFF
##645BDD	1.00	5.14	4.08	5.14
#FFFFFF	5.14	1.00	21.00	1.00
#000000	4.08	21.00	1.00	21.00
##FFFFFF	5.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0072E1

Deuteranopia (green-blind)

#0069DA

Tritanopia (blue-blind)

#2A7A93

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #645bdd;
/* rgb */ color: rgb(100, 91, 221);
/* oklch */ color: oklch(55.2% 0.192 281.2);

Tailwind

colors: {
  custom: {
    50: '#9a8ae8',
    500: '#645bdd',
    950: '#000000',
  },
}

SCSS

$custom: #645bdd;
$custom-light: #9a8ae8;
$custom-dark: #000000;

JSON

{
  "hex": "#645bdd",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 221
  },
  "hsl": {
    "h": 244.154,
    "s": 65.657,
    "l": 61.176
  },
  "oklch": {
    "l": 0.55219,
    "c": 0.19168,
    "h": 281.2
  },
  "luminance": 0.15412
}

Semantic roles & 50–950 ramp

primary

#645BDD

secondary

#DFE2B1

accent

#CE18C1

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0B16

muted

#7F7C84

Preview Lab

Preview with #645BDD

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

Preview Lab → · Contrast checker → · Palette generator →