#645BC8#645BC8

#645BC8 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.7% C 0.164 H 283.1°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#645BC8
RGB	rgb(100, 91, 200)
HSL	hsl(245, 50%, 57%)
HSV	hsv(245, 55%, 78%)
CMYK	cmyk(50%, 54.5%, 0%, 21.6%)
CIE-LAB	lab(44.75, 32.65, -55.87)
CIE-LCH	lch(44.75, 64.71, 300.30°)
OKLab	oklab(53.69% 0.0372 -0.1595)
OKLCH	oklch(53.69% 0.164 283.1)
XYZ	xyz(19.4188, 14.3606, 56.3810)
Luminance	0.1436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BC8 #BFC85B

analogous

#5B89C8 #645BC8 #9B5BC8

triadic

#645BC8 #C8645B #5BC864

tetradic

#645BC8 #C85B89 #BFC85B #5BC89B

square

#645BC8 #C85B89 #BFC85B #5BC89B

split-complementary

#645BC8 #C89B5B #89C85B

monochromatic

#312A7E #433AAC #645BC8 #8F89D7 #BBB7E7

Accessibility & contrast

On white

5.42

#645BC8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#645BC8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BC8

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BC8	#FFFFFF	#000000	##FFFFFF
##645BC8	1.00	5.42	3.87	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B6DCC

Deuteranopia (green-blind)

#1066C6

Tritanopia (blue-blind)

#3E7389

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bc8;
/* rgb */ color: rgb(100, 91, 200);
/* oklch */ color: oklch(53.7% 0.164 283.1);

Tailwind

colors: {
  custom: {
    50: '#9789d9',
    500: '#645bc8',
    950: '#000000',
  },
}

SCSS

$custom: #645bc8;
$custom-light: #9789d9;
$custom-dark: #000000;

JSON

{
  "hex": "#645bc8",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 200
  },
  "hsl": {
    "h": 244.954,
    "s": 49.772,
    "l": 57.059
  },
  "oklch": {
    "l": 0.5369,
    "c": 0.16382,
    "h": 283.1
  },
  "luminance": 0.14362
}

Semantic roles & 50–950 ramp

primary

#645BC8

secondary

#D2D6A9

accent

#D94FCE

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BC8

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

Preview Lab → · Contrast checker → · Palette generator →