#645ECC#645ECC

#645ECC is a mid, vivid blue. Relative luminance 0.151; OKLCH L 54.5% C 0.165 H 281.9°. Best body text is #FFFFFF at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#645ECC
RGB	rgb(100, 94, 204)
HSL	hsl(243, 52%, 58%)
HSV	hsv(243, 54%, 80%)
CMYK	cmyk(51%, 53.9%, 0%, 20%)
CIE-LAB	lab(45.73, 32.06, -56.58)
CIE-LCH	lch(45.73, 65.03, 299.54°)
OKLab	oklab(54.51% 0.034 -0.1616)
OKLCH	oklch(54.51% 0.165 281.9)
XYZ	xyz(20.1540, 15.0733, 58.9625)
Luminance	0.1507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645ECC #C6CC5E

analogous

#5E8FCC #645ECC #9B5ECC

triadic

#645ECC #CC645E #5ECC64

tetradic

#645ECC #CC5E8F #C6CC5E #5ECC9B

square

#645ECC #CC5E8F #C6CC5E #5ECC9B

split-complementary

#645ECC #CC9B5E #8FCC5E

monochromatic

#2F2A85 #4039B4 #645ECC #918CDB #BDBBE9

Accessibility & contrast

On white

5.23

#645ECC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#645ECC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645ECC

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645ECC	#FFFFFF	#000000	##FFFFFF
##645ECC	1.00	5.23	4.01	5.23
#FFFFFF	5.23	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F70D0

Deuteranopia (green-blind)

#1168CA

Tritanopia (blue-blind)

#3B778C

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #645ecc;
/* rgb */ color: rgb(100, 94, 204);
/* oklch */ color: oklch(54.5% 0.165 281.9);

Tailwind

colors: {
  custom: {
    50: '#978cdc',
    500: '#645ecc',
    950: '#000000',
  },
}

SCSS

$custom: #645ecc;
$custom-light: #978cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#645ecc",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 204
  },
  "hsl": {
    "h": 243.273,
    "s": 51.887,
    "l": 58.431
  },
  "oklch": {
    "l": 0.5451,
    "c": 0.16515,
    "h": 281.9
  },
  "luminance": 0.15074
}

Semantic roles & 50–950 ramp

primary

#645ECC

secondary

#D6D9AD

accent

#DB4CD4

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #645ECC

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

Preview Lab → · Contrast checker → · Palette generator →