#645DB7#645DB7

#645DB7 is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.9% C 0.137 H 284.2°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#645DB7
RGB	rgb(100, 93, 183)
HSL	hsl(245, 38%, 54%)
HSV	hsv(245, 49%, 72%)
CMYK	cmyk(45.4%, 49.2%, 0%, 28.2%)
CIE-LAB	lab(44.17, 26.25, -46.93)
CIE-LCH	lch(44.17, 53.77, 299.23°)
OKLab	oklab(52.92% 0.0337 -0.1332)
OKLCH	oklch(52.92% 0.137 284.2)
XYZ	xyz(17.7146, 13.9561, 46.5510)
Luminance	0.1396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645DB7 #B0B75D

analogous

#5D83B7 #645DB7 #915DB7

triadic

#645DB7 #B7645D #5DB764

tetradic

#645DB7 #B75D83 #B0B75D #5DB791

square

#645DB7 #B75D83 #B0B75D #5DB791

split-complementary

#645DB7 #B7915D #83B75D

monochromatic

#342F6A #494295 #645DB7 #8D87CA #B5B2DD

Accessibility & contrast

On white

5.54

#645DB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#645DB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645DB7

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645DB7	#FFFFFF	#000000	##FFFFFF
##645DB7	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)

#376BBA

Deuteranopia (green-blind)

#3366B5

Tritanopia (blue-blind)

#497081

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645db7;
/* rgb */ color: rgb(100, 93, 183);
/* oklch */ color: oklch(52.9% 0.137 284.2);

Tailwind

colors: {
  custom: {
    50: '#958bcd',
    500: '#645db7',
    950: '#000000',
  },
}

SCSS

$custom: #645db7;
$custom-light: #958bcd;
$custom-dark: #000000;

JSON

{
  "hex": "#645db7",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 183
  },
  "hsl": {
    "h": 244.667,
    "s": 38.462,
    "l": 54.118
  },
  "oklch": {
    "l": 0.52916,
    "c": 0.13743,
    "h": 284.2
  },
  "luminance": 0.13957
}

Semantic roles & 50–950 ramp

primary

#645DB7

secondary

#C8CBA5

accent

#CE59C5

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C13

muted

#7E7D82

Preview Lab

Preview with #645DB7

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

Preview Lab → · Contrast checker → · Palette generator →