#645BC7#645BC7

#645BC7 is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.6% C 0.162 H 283.2°. Best body text is #FFFFFF at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#645BC7
RGB	rgb(100, 91, 199)
HSL	hsl(245, 49%, 57%)
HSV	hsv(245, 54%, 78%)
CMYK	cmyk(49.7%, 54.3%, 0%, 22%)
CIE-LAB	lab(44.68, 32.34, -55.40)
CIE-LCH	lch(44.68, 64.15, 300.28°)
OKLab	oklab(53.62% 0.0372 -0.1582)
OKLCH	oklch(53.62% 0.162 283.2)
XYZ	xyz(19.3023, 14.3140, 55.7676)
Luminance	0.1431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BC7 #BEC75B

analogous

#5B88C7 #645BC7 #9A5BC7

triadic

#645BC7 #C7645B #5BC764

tetradic

#645BC7 #C75B88 #BEC75B #5BC79A

square

#645BC7 #C75B88 #BEC75B #5BC79A

split-complementary

#645BC7 #C79A5B #88C75B

monochromatic

#322B7D #443AAB #645BC7 #8F89D7 #BAB6E6

Accessibility & contrast

On white

5.44

#645BC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.86

#645BC7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BC7

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BC7	#FFFFFF	#000000	##FFFFFF
##645BC7	1.00	5.44	3.86	5.44
#FFFFFF	5.44	1.00	21.00	1.00
#000000	3.86	21.00	1.00	21.00
##FFFFFF	5.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D6DCB

Deuteranopia (green-blind)

#1366C5

Tritanopia (blue-blind)

#3F7388

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bc7;
/* rgb */ color: rgb(100, 91, 199);
/* oklch */ color: oklch(53.6% 0.162 283.2);

Tailwind

colors: {
  custom: {
    50: '#9789d9',
    500: '#645bc7',
    950: '#000000',
  },
}

SCSS

$custom: #645bc7;
$custom-light: #9789d9;
$custom-dark: #000000;

JSON

{
  "hex": "#645bc7",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 199
  },
  "hsl": {
    "h": 245,
    "s": 49.091,
    "l": 56.863
  },
  "oklch": {
    "l": 0.5362,
    "c": 0.16245,
    "h": 283.2
  },
  "luminance": 0.14315
}

Semantic roles & 50–950 ramp

primary

#645BC7

secondary

#D1D5A9

accent

#D94FCD

background

#F9F8FD

surface

#F2F0FA

border

#CCCBD3

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BC7

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

Preview Lab → · Contrast checker → · Palette generator →