#645CBB#645CBB

#645CBB is a mid, vivid blue. Relative luminance 0.140; OKLCH L 53.0% C 0.145 H 284.1°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#645CBB
RGB	rgb(100, 92, 187)
HSL	hsl(245, 41%, 55%)
HSV	hsv(245, 51%, 73%)
CMYK	cmyk(46.5%, 50.8%, 0%, 26.7%)
CIE-LAB	lab(44.16, 28.08, -49.27)
CIE-LCH	lch(44.16, 56.71, 299.68°)
OKLab	oklab(52.99% 0.0353 -0.1401)
OKLCH	oklch(52.99% 0.145 284.1)
XYZ	xyz(18.0497, 13.9506, 48.7458)
Luminance	0.1395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CBB #B3BB5C

analogous

#5C83BB #645CBB #945CBB

triadic

#645CBB #BB645C #5CBB64

tetradic

#645CBB #BB5C83 #B3BB5C #5CBB94

square

#645CBB #BB5C83 #B3BB5C #5CBB94

split-complementary

#645CBB #BB945C #83BB5C

monochromatic

#342E6F #48409A #645CBB #8D87CD #B6B2DF

Accessibility & contrast

On white

5.54

#645CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#645CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CBB

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CBB	#FFFFFF	#000000	##FFFFFF
##645CBB	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)

#316BBE

Deuteranopia (green-blind)

#2C65B9

Tritanopia (blue-blind)

#477083

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645cbb;
/* rgb */ color: rgb(100, 92, 187);
/* oklch */ color: oklch(53.0% 0.145 284.1);

Tailwind

colors: {
  custom: {
    50: '#958ad0',
    500: '#645cbb',
    950: '#000000',
  },
}

SCSS

$custom: #645cbb;
$custom-light: #958ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#645cbb",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 187
  },
  "hsl": {
    "h": 245.053,
    "s": 41.126,
    "l": 54.706
  },
  "oklch": {
    "l": 0.52988,
    "c": 0.14451,
    "h": 284.1
  },
  "luminance": 0.13951
}

Semantic roles & 50–950 ramp

primary

#645CBB

secondary

#CACDA5

accent

#D157C7

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #645CBB

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

Preview Lab → · Contrast checker → · Palette generator →