#645FCB#645FCB

#645FCB is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.6% C 0.162 H 281.7°. Best body text is #FFFFFF at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#645FCB
RGB	rgb(100, 95, 203)
HSL	hsl(243, 51%, 58%)
HSV	hsv(243, 53%, 80%)
CMYK	cmyk(50.7%, 53.2%, 0%, 20.4%)
CIE-LAB	lab(45.91, 31.14, -55.72)
CIE-LCH	lch(45.91, 63.83, 299.20°)
OKLab	oklab(54.62% 0.0328 -0.1591)
OKLCH	oklch(54.62% 0.162 281.7)
XYZ	xyz(20.1239, 15.2044, 58.3627)
Luminance	0.1521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645FCB #C6CB5F

analogous

#5F90CB #645FCB #9A5FCB

triadic

#645FCB #CB645F #5FCB64

tetradic

#645FCB #CB5F90 #C6CB5F #5FCB9A

square

#645FCB #CB5F90 #C6CB5F #5FCB9A

split-complementary

#645FCB #CB9A5F #90CB5F

monochromatic

#2F2B85 #403AB3 #645FCB #918DDA #BDBBE9

Accessibility & contrast

On white

5.20

#645FCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#645FCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645FCB

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645FCB	#FFFFFF	#000000	##FFFFFF
##645FCB	1.00	5.20	4.04	5.20
#FFFFFF	5.20	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2471CF

Deuteranopia (green-blind)

#1869C9

Tritanopia (blue-blind)

#3B778C

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #645fcb;
/* rgb */ color: rgb(100, 95, 203);
/* oklch */ color: oklch(54.6% 0.162 281.7);

Tailwind

colors: {
  custom: {
    50: '#978cdb',
    500: '#645fcb',
    950: '#000000',
  },
}

SCSS

$custom: #645fcb;
$custom-light: #978cdb;
$custom-dark: #000000;

JSON

{
  "hex": "#645fcb",
  "rgb": {
    "r": 100,
    "g": 95,
    "b": 203
  },
  "hsl": {
    "h": 242.778,
    "s": 50.943,
    "l": 58.431
  },
  "oklch": {
    "l": 0.54623,
    "c": 0.16241,
    "h": 281.7
  },
  "luminance": 0.15206
}

Semantic roles & 50–950 ramp

primary

#645FCB

secondary

#D6D8AD

accent

#DA4DD4

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #645FCB

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

Preview Lab → · Contrast checker → · Palette generator →