#645CBA#645CBA

#645CBA is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.9% C 0.143 H 284.2°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#645CBA
RGB	rgb(100, 92, 186)
HSL	hsl(245, 41%, 55%)
HSV	hsv(245, 51%, 73%)
CMYK	cmyk(46.2%, 50.5%, 0%, 27.1%)
CIE-LAB	lab(44.10, 27.77, -48.79)
CIE-LCH	lch(44.10, 56.14, 299.65°)
OKLab	oklab(52.92% 0.0352 -0.1387)
OKLCH	oklch(52.92% 0.143 284.2)
XYZ	xyz(17.9430, 13.9080, 48.1839)
Luminance	0.1391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CBA #B2BA5C

analogous

#5C83BA #645CBA #935CBA

triadic

#645CBA #BA645C #5CBA64

tetradic

#645CBA #BA5C83 #B2BA5C #5CBA93

square

#645CBA #BA5C83 #B2BA5C #5CBA93

split-complementary

#645CBA #BA935C #83BA5C

monochromatic

#342E6D #484098 #645CBA #8D87CC #B6B2DE

Accessibility & contrast

On white

5.55

#645CBA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#645CBA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CBA

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

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

#326BBD

Deuteranopia (green-blind)

#2E65B8

Tritanopia (blue-blind)

#487082

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645cba;
/* rgb */ color: rgb(100, 92, 186);
/* oklch */ color: oklch(52.9% 0.143 284.2);

Tailwind

colors: {
  custom: {
    50: '#958acf',
    500: '#645cba',
    950: '#000000',
  },
}

SCSS

$custom: #645cba;
$custom-light: #958acf;
$custom-dark: #000000;

JSON

{
  "hex": "#645cba",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 186
  },
  "hsl": {
    "h": 245.106,
    "s": 40.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.52923,
    "c": 0.1431,
    "h": 284.2
  },
  "luminance": 0.13909
}

Semantic roles & 50–950 ramp

primary

#645CBA

secondary

#C9CDA5

accent

#D057C6

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #645CBA

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

Preview Lab → · Contrast checker → · Palette generator →