#645CB7#645CB7

#645CB7 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.7% C 0.139 H 284.6°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#645CB7
RGB	rgb(100, 92, 183)
HSL	hsl(245, 39%, 54%)
HSV	hsv(245, 50%, 72%)
CMYK	cmyk(45.4%, 49.7%, 0%, 28.2%)
CIE-LAB	lab(43.92, 26.87, -47.33)
CIE-LCH	lch(43.92, 54.42, 299.58°)
OKLab	oklab(52.73% 0.0349 -0.1344)
OKLCH	oklch(52.73% 0.139 284.6)
XYZ	xyz(17.6274, 13.7817, 46.5219)
Luminance	0.1378 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CB7 #AFB75C

analogous

#5C82B7 #645CB7 #925CB7

triadic

#645CB7 #B7645C #5CB764

tetradic

#645CB7 #B75C82 #AFB75C #5CB792

square

#645CB7 #B75C82 #AFB75C #5CB792

split-complementary

#645CB7 #B7925C #82B75C

monochromatic

#342F6A #494294 #645CB7 #8C86CA #B5B1DD

Accessibility & contrast

On white

5.59

#645CB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#645CB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CB7

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CB7	#FFFFFF	#000000	##FFFFFF
##645CB7	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#356BBA

Deuteranopia (green-blind)

#3165B5

Tritanopia (blue-blind)

#496F81

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645cb7;
/* rgb */ color: rgb(100, 92, 183);
/* oklch */ color: oklch(52.7% 0.139 284.6);

Tailwind

colors: {
  custom: {
    50: '#958acd',
    500: '#645cb7',
    950: '#000000',
  },
}

SCSS

$custom: #645cb7;
$custom-light: #958acd;
$custom-dark: #000000;

JSON

{
  "hex": "#645cb7",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 183
  },
  "hsl": {
    "h": 245.275,
    "s": 38.723,
    "l": 53.922
  },
  "oklch": {
    "l": 0.52727,
    "c": 0.13889,
    "h": 284.6
  },
  "luminance": 0.13783
}

Semantic roles & 50–950 ramp

primary

#645CB7

secondary

#C7CBA4

accent

#CF59C4

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645CB7

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

Preview Lab → · Contrast checker → · Palette generator →