#645BF1#645BF1

#645BF1 is a mid, highly saturated blue. Relative luminance 0.165; OKLCH L 56.8% C 0.217 H 279.6°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#645BF1
RGB	rgb(100, 91, 241)
HSL	hsl(244, 84%, 65%)
HSV	hsv(244, 62%, 95%)
CMYK	cmyk(58.5%, 62.2%, 0%, 5.5%)
CIE-LAB	lab(47.68, 45.33, -74.43)
CIE-LCH	lch(47.68, 87.15, 301.34°)
OKLab	oklab(56.77% 0.0362 -0.2141)
OKLCH	oklch(56.77% 0.217 279.6)
XYZ	xyz(24.8688, 16.5406, 85.0842)
Luminance	0.1654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BF1 #E8F15B

analogous

#5B9DF1 #645BF1 #AF5BF1

triadic

#645BF1 #F1645B #5BF164

tetradic

#645BF1 #F15B9D #E8F15B #5BF1AF

square

#645BF1 #F15B9D #E8F15B #5BF1AF

split-complementary

#645BF1 #F1AF5B #9DF15B

monochromatic

#1B10C1 #2F23EC #645BF1 #9993F6 #CFCCFB

Accessibility & contrast

On white

4.87

#645BF1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#645BF1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BF1

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BF1	#FFFFFF	#000000	##FFFFFF
##645BF1	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0077F6

Deuteranopia (green-blind)

#006BEE

Tritanopia (blue-blind)

#00809E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #645bf1;
/* rgb */ color: rgb(100, 91, 241);
/* oklch */ color: oklch(56.8% 0.217 279.6);

Tailwind

colors: {
  custom: {
    50: '#9d8af7',
    500: '#645bf1',
    950: '#000000',
  },
}

SCSS

$custom: #645bf1;
$custom-light: #9d8af7;
$custom-dark: #000000;

JSON

{
  "hex": "#645bf1",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 241
  },
  "hsl": {
    "h": 243.6,
    "s": 84.27,
    "l": 65.098
  },
  "oklch": {
    "l": 0.56774,
    "c": 0.21715,
    "h": 279.6
  },
  "luminance": 0.16542
}

Semantic roles & 50–950 ramp

primary

#645BF1

secondary

#EAEDBA

accent

#E105D4

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #645BF1

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

Preview Lab → · Contrast checker → · Palette generator →