#645BF4#645BF4

#645BF4 is a mid, highly saturated blue. Relative luminance 0.167; OKLCH L 57.0% C 0.221 H 279.4°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#645BF4
RGB	rgb(100, 91, 244)
HSL	hsl(244, 87%, 66%)
HSV	hsv(244, 63%, 96%)
CMYK	cmyk(59%, 62.7%, 0%, 4.3%)
CIE-LAB	lab(47.91, 46.26, -75.73)
CIE-LCH	lch(47.91, 88.74, 301.42°)
OKLab	oklab(57.01% 0.036 -0.2179)
OKLCH	oklch(57.01% 0.221 279.4)
XYZ	xyz(25.3206, 16.7213, 87.4637)
Luminance	0.1672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BF4 #EBF45B

analogous

#5B9FF4 #645BF4 #B05BF4

triadic

#645BF4 #F4645B #5BF464

tetradic

#645BF4 #F45B9F #EBF45B #5BF4B0

square

#645BF4 #F45B9F #EBF45B #5BF4B0

split-complementary

#645BF4 #F4B05B #9FF45B

monochromatic

#180DC7 #2E22F0 #645BF4 #9A94F8 #D0CEFC

Accessibility & contrast

On white

4.83

#645BF4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#645BF4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BF4

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BF4	#FFFFFF	#000000	##FFFFFF
##645BF4	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078F9

Deuteranopia (green-blind)

#006CF1

Tritanopia (blue-blind)

#00819F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #645bf4;
/* rgb */ color: rgb(100, 91, 244);
/* oklch */ color: oklch(57.0% 0.221 279.4);

Tailwind

colors: {
  custom: {
    50: '#9e8af9',
    500: '#645bf4',
    950: '#000000',
  },
}

SCSS

$custom: #645bf4;
$custom-light: #9e8af9;
$custom-dark: #000000;

JSON

{
  "hex": "#645bf4",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 244
  },
  "hsl": {
    "h": 243.529,
    "s": 87.429,
    "l": 65.686
  },
  "oklch": {
    "l": 0.57014,
    "c": 0.22089,
    "h": 279.4
  },
  "luminance": 0.16723
}

Semantic roles & 50–950 ramp

primary

#645BF4

secondary

#ECEFBC

accent

#E402D7

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #645BF4

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

Preview Lab → · Contrast checker → · Palette generator →