#645ACB#645ACB

#645ACB is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.7% C 0.169 H 283.1°. Best body text is #FFFFFF at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#645ACB
RGB	rgb(100, 90, 203)
HSL	hsl(245, 52%, 57%)
HSV	hsv(245, 56%, 80%)
CMYK	cmyk(50.7%, 55.7%, 0%, 20.4%)
CIE-LAB	lab(44.71, 34.18, -57.66)
CIE-LCH	lch(44.71, 67.03, 300.66°)
OKLab	oklab(53.72% 0.0384 -0.1648)
OKLCH	oklch(53.72% 0.169 283.1)
XYZ	xyz(19.6879, 14.3324, 58.2174)
Luminance	0.1433 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645ACB #C1CB5A

analogous

#5A88CB #645ACB #9D5ACB

triadic

#645ACB #CB645A #5ACB64

tetradic

#645ACB #CB5A88 #C1CB5A #5ACB9D

square

#645ACB #CB5A88 #C1CB5A #5ACB9D

split-complementary

#645ACB #CB9D5A #88CB5A

monochromatic

#312982 #4238B0 #645ACB #9089DA #BBB7E8

Accessibility & contrast

On white

5.43

#645ACB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#645ACB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645ACB

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645ACB	#FFFFFF	#000000	##FFFFFF
##645ACB	1.00	5.43	3.87	5.43
#FFFFFF	5.43	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F6DCF

Deuteranopia (green-blind)

#0066C9

Tritanopia (blue-blind)

#3C748A

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645acb;
/* rgb */ color: rgb(100, 90, 203);
/* oklch */ color: oklch(53.7% 0.169 283.1);

Tailwind

colors: {
  custom: {
    50: '#9889dc',
    500: '#645acb',
    950: '#000000',
  },
}

SCSS

$custom: #645acb;
$custom-light: #9889dc;
$custom-dark: #000000;

JSON

{
  "hex": "#645acb",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 203
  },
  "hsl": {
    "h": 245.31,
    "s": 52.074,
    "l": 57.451
  },
  "oklch": {
    "l": 0.53724,
    "c": 0.16923,
    "h": 283.1
  },
  "luminance": 0.14333
}

Semantic roles & 50–950 ramp

primary

#645ACB

secondary

#D3D7AA

accent

#DC4CCF

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645ACB

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

Preview Lab → · Contrast checker → · Palette generator →