#645BB7#645BB7

#645BB7 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.5% C 0.140 H 284.9°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#645BB7
RGB	rgb(100, 91, 183)
HSL	hsl(246, 39%, 54%)
HSV	hsv(246, 50%, 72%)
CMYK	cmyk(45.4%, 50.3%, 0%, 28.2%)
CIE-LAB	lab(43.67, 27.48, -47.73)
CIE-LCH	lch(43.67, 55.08, 299.93°)
OKLab	oklab(52.54% 0.0362 -0.1356)
OKLCH	oklch(52.54% 0.14 284.9)
XYZ	xyz(17.5414, 13.6096, 46.4932)
Luminance	0.1361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BB7 #AEB75B

analogous

#5B80B7 #645BB7 #925BB7

triadic

#645BB7 #B7645B #5BB764

tetradic

#645BB7 #B75B80 #AEB75B #5BB792

square

#645BB7 #B75B80 #AEB75B #5BB792

split-complementary

#645BB7 #B7925B #80B75B

monochromatic

#342E69 #494194 #645BB7 #8C86CA #B4B0DC

Accessibility & contrast

On white

5.64

#645BB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#645BB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BB7

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BB7	#FFFFFF	#000000	##FFFFFF
##645BB7	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#336ABA

Deuteranopia (green-blind)

#2F64B5

Tritanopia (blue-blind)

#496E80

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #645bb7;
/* rgb */ color: rgb(100, 91, 183);
/* oklch */ color: oklch(52.5% 0.140 284.9);

Tailwind

colors: {
  custom: {
    50: '#9589cd',
    500: '#645bb7',
    950: '#000000',
  },
}

SCSS

$custom: #645bb7;
$custom-light: #9589cd;
$custom-dark: #000000;

JSON

{
  "hex": "#645bb7",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 183
  },
  "hsl": {
    "h": 245.87,
    "s": 38.983,
    "l": 53.725
  },
  "oklch": {
    "l": 0.52539,
    "c": 0.14035,
    "h": 284.9
  },
  "luminance": 0.1361
}

Semantic roles & 50–950 ramp

primary

#645BB7

secondary

#C7CBA3

accent

#CF59C3

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645BB7

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

Preview Lab → · Contrast checker → · Palette generator →