#645BBE#645BBE

#645BBE is a mid, vivid blue. Relative luminance 0.139; OKLCH L 53.0% C 0.150 H 284.1°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#645BBE
RGB	rgb(100, 91, 190)
HSL	hsl(245, 43%, 55%)
HSV	hsv(245, 52%, 75%)
CMYK	cmyk(47.4%, 52.1%, 0%, 25.5%)
CIE-LAB	lab(44.10, 29.60, -51.11)
CIE-LCH	lch(44.10, 59.07, 300.07°)
OKLab	oklab(53% 0.0367 -0.1456)
OKLCH	oklch(53% 0.15 284.1)
XYZ	xyz(18.2881, 13.9083, 50.4262)
Luminance	0.1391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BBE #B5BE5B

analogous

#5B83BE #645BBE #965BBE

triadic

#645BBE #BE645B #5BBE64

tetradic

#645BBE #BE5B83 #B5BE5B #5BBE96

square

#645BBE #BE5B83 #B5BE5B #5BBE96

split-complementary

#645BBE #BE965B #83BE5B

monochromatic

#332D72 #473E9D #645BBE #8D87CF #B7B3E1

Accessibility & contrast

On white

5.55

#645BBE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#645BBE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BBE

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BBE	#FFFFFF	#000000	##FFFFFF
##645BBE	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B6BC1

Deuteranopia (green-blind)

#2665BC

Tritanopia (blue-blind)

#457084

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645bbe;
/* rgb */ color: rgb(100, 91, 190);
/* oklch */ color: oklch(53.0% 0.150 284.1);

Tailwind

colors: {
  custom: {
    50: '#9689d2',
    500: '#645bbe',
    950: '#000000',
  },
}

SCSS

$custom: #645bbe;
$custom-light: #9689d2;
$custom-dark: #000000;

JSON

{
  "hex": "#645bbe",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 190
  },
  "hsl": {
    "h": 245.455,
    "s": 43.231,
    "l": 55.098
  },
  "oklch": {
    "l": 0.53003,
    "c": 0.15011,
    "h": 284.1
  },
  "luminance": 0.13909
}

Semantic roles & 50–950 ramp

primary

#645BBE

secondary

#CBCFA6

accent

#D355C8

background

#F9F8FD

surface

#F2F0FA

border

#CCCBD3

text

#0E0B14

muted

#7E7C83

Preview Lab

Preview with #645BBE

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

Preview Lab → · Contrast checker → · Palette generator →