#645BCC#645BCC

#645BCC is a mid, vivid blue. Relative luminance 0.146; OKLCH L 54.0% C 0.169 H 282.7°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#645BCC
RGB	rgb(100, 91, 204)
HSL	hsl(245, 53%, 58%)
HSV	hsv(245, 55%, 80%)
CMYK	cmyk(51%, 55.4%, 0%, 20%)
CIE-LAB	lab(45.01, 33.88, -57.75)
CIE-LCH	lch(45.01, 66.95, 300.40°)
OKLab	oklab(53.97% 0.0373 -0.165)
OKLCH	oklch(53.97% 0.169 282.7)
XYZ	xyz(19.8924, 14.5500, 58.8753)
Luminance	0.1455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BCC #C3CC5B

analogous

#5B8ACC #645BCC #9D5BCC

triadic

#645BCC #CC645B #5BCC64

tetradic

#645BCC #CC5B8A #C3CC5B #5BCC9D

square

#645BCC #CC5B8A #C3CC5B #5BCC9D

split-complementary

#645BCC #CC9D5B #8ACC5B

monochromatic

#302984 #4137B2 #645BCC #908ADB #BCB8E9

Accessibility & contrast

On white

5.37

#645BCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#645BCC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BCC

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BCC	#FFFFFF	#000000	##FFFFFF
##645BCC	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#116ED0

Deuteranopia (green-blind)

#0067CA

Tritanopia (blue-blind)

#3B758B

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bcc;
/* rgb */ color: rgb(100, 91, 204);
/* oklch */ color: oklch(54.0% 0.169 282.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#645bcc",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 204
  },
  "hsl": {
    "h": 244.779,
    "s": 52.558,
    "l": 57.843
  },
  "oklch": {
    "l": 0.53973,
    "c": 0.16921,
    "h": 282.7
  },
  "luminance": 0.14551
}

Semantic roles & 50–950 ramp

primary

#645BCC

secondary

#D4D8AB

accent

#DC4CD0

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BCC

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

Preview Lab → · Contrast checker → · Palette generator →