#645CF3#645CF3

#645CF3 is a mid, highly saturated blue. Relative luminance 0.168; OKLCH L 57.1% C 0.218 H 279.3°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#645CF3
RGB	rgb(100, 92, 243)
HSL	hsl(243, 86%, 66%)
HSV	hsv(243, 62%, 95%)
CMYK	cmyk(58.8%, 62.1%, 0%, 4.7%)
CIE-LAB	lab(48.05, 45.37, -74.94)
CIE-LCH	lch(48.05, 87.61, 301.19°)
OKLab	oklab(57.09% 0.0352 -0.2156)
OKLCH	oklch(57.09% 0.218 279.3)
XYZ	xyz(25.2552, 16.8329, 86.6949)
Luminance	0.1683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CF3 #EBF35C

analogous

#5C9FF3 #645CF3 #AF5CF3

triadic

#645CF3 #F3645C #5CF364

tetradic

#645CF3 #F35C9F #EBF35C #5CF3AF

square

#645CF3 #F35C9F #EBF35C #5CF3AF

split-complementary

#645CF3 #F3AF5C #9FF35C

monochromatic

#180FC6 #2E23EF #645CF3 #9A95F7 #D0CEFB

Accessibility & contrast

On white

4.81

#645CF3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#645CF3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CF3

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CF3	#FFFFFF	#000000	##FFFFFF
##645CF3	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078F8

Deuteranopia (green-blind)

#006CF0

Tritanopia (blue-blind)

#00829F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #645cf3;
/* rgb */ color: rgb(100, 92, 243);
/* oklch */ color: oklch(57.1% 0.218 279.3);

Tailwind

colors: {
  custom: {
    50: '#9d8bf8',
    500: '#645cf3',
    950: '#000000',
  },
}

SCSS

$custom: #645cf3;
$custom-light: #9d8bf8;
$custom-dark: #000000;

JSON

{
  "hex": "#645cf3",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 243
  },
  "hsl": {
    "h": 243.179,
    "s": 86.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.57094,
    "c": 0.21847,
    "h": 279.3
  },
  "luminance": 0.16835
}

Semantic roles & 50–950 ramp

primary

#645CF3

secondary

#ECEFBC

accent

#E303D7

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #645CF3

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

Preview Lab → · Contrast checker → · Palette generator →