#645BCB#645BCB

#645BCB is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.9% C 0.168 H 282.8°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#645BCB
RGB	rgb(100, 91, 203)
HSL	hsl(245, 52%, 58%)
HSV	hsv(245, 55%, 80%)
CMYK	cmyk(50.7%, 55.2%, 0%, 20.4%)
CIE-LAB	lab(44.94, 33.57, -57.28)
CIE-LCH	lch(44.94, 66.39, 300.38°)
OKLab	oklab(53.9% 0.0373 -0.1637)
OKLCH	oklch(53.9% 0.168 282.8)
XYZ	xyz(19.7728, 14.5022, 58.2457)
Luminance	0.1450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BCB #C2CB5B

analogous

#5B8ACB #645BCB #9C5BCB

triadic

#645BCB #CB645B #5BCB64

tetradic

#645BCB #CB5B8A #C2CB5B #5BCB9C

square

#645BCB #CB5B8A #C2CB5B #5BCB9C

split-complementary

#645BCB #CB9C5B #8ACB5B

monochromatic

#302982 #4238B1 #645BCB #9089DA #BCB8E8

Accessibility & contrast

On white

5.38

#645BCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#645BCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BCB

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BCB	#FFFFFF	#000000	##FFFFFF
##645BCB	1.00	5.38	3.90	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#146ECF

Deuteranopia (green-blind)

#0267C9

Tritanopia (blue-blind)

#3C748A

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bcb;
/* rgb */ color: rgb(100, 91, 203);
/* oklch */ color: oklch(53.9% 0.168 282.8);

Tailwind

colors: {
  custom: {
    50: '#9889db',
    500: '#645bcb',
    950: '#000000',
  },
}

SCSS

$custom: #645bcb;
$custom-light: #9889db;
$custom-dark: #000000;

JSON

{
  "hex": "#645bcb",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 203
  },
  "hsl": {
    "h": 244.821,
    "s": 51.852,
    "l": 57.647
  },
  "oklch": {
    "l": 0.53902,
    "c": 0.16787,
    "h": 282.8
  },
  "luminance": 0.14503
}

Semantic roles & 50–950 ramp

primary

#645BCB

secondary

#D4D7AA

accent

#DB4CD0

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BCB

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

Preview Lab → · Contrast checker → · Palette generator →