#645BDF#645BDF

#645BDF is a mid, vivid blue. Relative luminance 0.155; OKLCH L 55.4% C 0.194 H 281.0°. Best body text is #FFFFFF at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#645BDF
RGB	rgb(100, 91, 223)
HSL	hsl(244, 67%, 62%)
HSV	hsv(244, 59%, 87%)
CMYK	cmyk(55.2%, 59.2%, 0%, 12.5%)
CIE-LAB	lab(46.34, 39.75, -66.46)
CIE-LCH	lch(46.34, 77.44, 300.89°)
OKLab	oklab(55.37% 0.0372 -0.1907)
OKLCH	oklch(55.37% 0.194 281)
XYZ	xyz(22.3118, 15.5178, 71.6173)
Luminance	0.1552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BDF #D6DF5B

analogous

#5B94DF #645BDF #A65BDF

triadic

#645BDF #DF645B #5BDF64

tetradic

#645BDF #DF5B94 #D6DF5B #5BDFA6

square

#645BDF #DF5B94 #D6DF5B #5BDFA6

split-complementary

#645BDF #DFA65B #94DF5B

monochromatic

#281FA0 #3529D4 #645BDF #948EE9 #C5C1F3

Accessibility & contrast

On white

5.12

#645BDF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#645BDF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BDF

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BDF	#FFFFFF	#000000	##FFFFFF
##645BDF	1.00	5.12	4.10	5.12
#FFFFFF	5.12	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0073E3

Deuteranopia (green-blind)

#0069DC

Tritanopia (blue-blind)

#277A94

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #645bdf;
/* rgb */ color: rgb(100, 91, 223);
/* oklch */ color: oklch(55.4% 0.194 281.0);

Tailwind

colors: {
  custom: {
    50: '#9a8aea',
    500: '#645bdf',
    950: '#000000',
  },
}

SCSS

$custom: #645bdf;
$custom-light: #9a8aea;
$custom-dark: #000000;

JSON

{
  "hex": "#645bdf",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 223
  },
  "hsl": {
    "h": 244.091,
    "s": 67.347,
    "l": 61.569
  },
  "oklch": {
    "l": 0.55371,
    "c": 0.19428,
    "h": 281
  },
  "luminance": 0.15519
}

Semantic roles & 50–950 ramp

primary

#645BDF

secondary

#E0E3B2

accent

#CF16C3

background

#FAF8FE

surface

#F4F0FD

border

#CECBD5

text

#0F0B16

muted

#7F7C84

Preview Lab

Preview with #645BDF

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

Preview Lab → · Contrast checker → · Palette generator →