#645BCD#645BCD

#645BCD is a mid, vivid blue. Relative luminance 0.146; OKLCH L 54.0% C 0.171 H 282.6°. Best body text is #FFFFFF at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#645BCD
RGB	rgb(100, 91, 205)
HSL	hsl(245, 53%, 58%)
HSV	hsv(245, 56%, 80%)
CMYK	cmyk(51.2%, 55.6%, 0%, 19.6%)
CIE-LAB	lab(45.08, 34.19, -58.21)
CIE-LCH	lch(45.08, 67.51, 300.43°)
OKLab	oklab(54.04% 0.0373 -0.1664)
OKLCH	oklch(54.04% 0.171 282.6)
XYZ	xyz(20.0127, 14.5982, 59.5090)
Luminance	0.1460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BCD #C4CD5B

analogous

#5B8BCD #645BCD #9D5BCD

triadic

#645BCD #CD645B #5BCD64

tetradic

#645BCD #CD5B8B #C4CD5B #5BCD9D

square

#645BCD #CD5B8B #C4CD5B #5BCD9D

split-complementary

#645BCD #CD9D5B #8BCD5B

monochromatic

#302985 #4137B4 #645BCD #908ADB #BDB9EA

Accessibility & contrast

On white

5.36

#645BCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#645BCD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BCD

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BCD	#FFFFFF	#000000	##FFFFFF
##645BCD	1.00	5.36	3.92	5.36
#FFFFFF	5.36	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E6ED1

Deuteranopia (green-blind)

#0067CB

Tritanopia (blue-blind)

#3A758B

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #645bcd;
/* rgb */ color: rgb(100, 91, 205);
/* oklch */ color: oklch(54.0% 0.171 282.6);

Tailwind

colors: {
  custom: {
    50: '#9889dd',
    500: '#645bcd',
    950: '#000000',
  },
}

SCSS

$custom: #645bcd;
$custom-light: #9889dd;
$custom-dark: #000000;

JSON

{
  "hex": "#645bcd",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 205
  },
  "hsl": {
    "h": 244.737,
    "s": 53.271,
    "l": 58.039
  },
  "oklch": {
    "l": 0.54044,
    "c": 0.17056,
    "h": 282.6
  },
  "luminance": 0.14599
}

Semantic roles & 50–950 ramp

primary

#645BCD

secondary

#D5D9AB

accent

#DD4BD1

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BCD

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

Preview Lab → · Contrast checker → · Palette generator →