#645BBF#645BBF

#645BBF is a mid, vivid blue. Relative luminance 0.140; OKLCH L 53.1% C 0.151 H 284.0°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#645BBF
RGB	rgb(100, 91, 191)
HSL	hsl(245, 44%, 55%)
HSV	hsv(245, 52%, 75%)
CMYK	cmyk(47.6%, 52.4%, 0%, 25.1%)
CIE-LAB	lab(44.16, 29.90, -51.59)
CIE-LCH	lch(44.16, 59.63, 300.10°)
OKLab	oklab(53.07% 0.0368 -0.147)
OKLCH	oklch(53.07% 0.152 284)
XYZ	xyz(18.3978, 13.9522, 51.0038)
Luminance	0.1395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BBF #B6BF5B

analogous

#5B84BF #645BBF #965BBF

triadic

#645BBF #BF645B #5BBF64

tetradic

#645BBF #BF5B84 #B6BF5B #5BBF96

square

#645BBF #BF5B84 #B6BF5B #5BBF96

split-complementary

#645BBF #BF965B #84BF5B

monochromatic

#332D73 #473E9F #645BBF #8E87D0 #B7B3E1

Accessibility & contrast

On white

5.54

#645BBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#645BBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BBF

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BBF	#FFFFFF	#000000	##FFFFFF
##645BBF	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A6CC2

Deuteranopia (green-blind)

#2565BD

Tritanopia (blue-blind)

#457184

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645bbf;
/* rgb */ color: rgb(100, 91, 191);
/* oklch */ color: oklch(53.1% 0.151 284.0);

Tailwind

colors: {
  custom: {
    50: '#9689d3',
    500: '#645bbf',
    950: '#000000',
  },
}

SCSS

$custom: #645bbf;
$custom-light: #9689d3;
$custom-dark: #000000;

JSON

{
  "hex": "#645bbf",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 191
  },
  "hsl": {
    "h": 245.4,
    "s": 43.86,
    "l": 55.294
  },
  "oklch": {
    "l": 0.5307,
    "c": 0.1515,
    "h": 284
  },
  "luminance": 0.13953
}

Semantic roles & 50–950 ramp

primary

#645BBF

secondary

#CCD0A6

accent

#D454C8

background

#F9F8FD

surface

#F2F0FA

border

#CCCBD3

text

#0E0B14

muted

#7E7C83

Preview Lab

Preview with #645BBF

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

Preview Lab → · Contrast checker → · Palette generator →