#645BE9#645BE9

#645BE9 is a mid, highly saturated blue. Relative luminance 0.161; OKLCH L 56.1% C 0.207 H 280.2°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#645BE9
RGB	rgb(100, 91, 233)
HSL	hsl(244, 76%, 64%)
HSV	hsv(244, 61%, 91%)
CMYK	cmyk(57.1%, 60.9%, 0%, 8.6%)
CIE-LAB	lab(47.07, 42.85, -70.92)
CIE-LCH	lch(47.07, 82.86, 301.14°)
OKLab	oklab(56.14% 0.0367 -0.2038)
OKLCH	oklch(56.14% 0.207 280.2)
XYZ	xyz(23.7000, 16.0731, 78.9285)
Luminance	0.1608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BE9 #E0E95B

analogous

#5B99E9 #645BE9 #AB5BE9

triadic

#645BE9 #E9645B #5BE964

tetradic

#645BE9 #E95B99 #E0E95B #5BE9AB

square

#645BE9 #E95B99 #E0E95B #5BE9AB

split-complementary

#645BE9 #E9AB5B #99E95B

monochromatic

#2218B2 #3125E2 #645BE9 #9791F0 #CAC7F7

Accessibility & contrast

On white

4.98

#645BE9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#645BE9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BE9

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BE9	#FFFFFF	#000000	##FFFFFF
##645BE9	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0075EE

Deuteranopia (green-blind)

#006AE6

Tritanopia (blue-blind)

#137E99

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #645be9;
/* rgb */ color: rgb(100, 91, 233);
/* oklch */ color: oklch(56.1% 0.207 280.2);

Tailwind

colors: {
  custom: {
    50: '#9c8af1',
    500: '#645be9',
    950: '#000000',
  },
}

SCSS

$custom: #645be9;
$custom-light: #9c8af1;
$custom-dark: #000000;

JSON

{
  "hex": "#645be9",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 233
  },
  "hsl": {
    "h": 243.803,
    "s": 76.344,
    "l": 63.529
  },
  "oklch": {
    "l": 0.56141,
    "c": 0.20709,
    "h": 280.2
  },
  "luminance": 0.16075
}

Semantic roles & 50–950 ramp

primary

#645BE9

secondary

#E6E9B7

accent

#D90DCC

background

#FAF8FE

surface

#F4F0FD

border

#CECBD5

text

#0F0C17

muted

#7F7D85

Preview Lab

Preview with #645BE9

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

Preview Lab → · Contrast checker → · Palette generator →