#645BBB#645BBB

#645BBB is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.8% C 0.146 H 284.5°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#645BBB
RGB	rgb(100, 91, 187)
HSL	hsl(246, 41%, 55%)
HSV	hsv(246, 51%, 73%)
CMYK	cmyk(46.5%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(43.91, 28.69, -49.67)
CIE-LCH	lch(43.91, 57.36, 300.01°)
OKLab	oklab(52.8% 0.0365 -0.1413)
OKLCH	oklch(52.8% 0.146 284.5)
XYZ	xyz(17.9636, 13.7785, 48.7171)
Luminance	0.1378 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BBB #B2BB5B

analogous

#5B82BB #645BBB #945BBB

triadic

#645BBB #BB645B #5BBB64

tetradic

#645BBB #BB5B82 #B2BB5B #5BBB94

square

#645BBB #BB5B82 #B2BB5B #5BBB94

split-complementary

#645BBB #BB945B #82BB5B

monochromatic

#342E6E #484099 #645BBB #8D86CD #B6B2DF

Accessibility & contrast

On white

5.59

#645BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#645BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BBB

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

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

#2E6BBE

Deuteranopia (green-blind)

#2A65B9

Tritanopia (blue-blind)

#477082

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645bbb;
/* rgb */ color: rgb(100, 91, 187);
/* oklch */ color: oklch(52.8% 0.146 284.5);

Tailwind

colors: {
  custom: {
    50: '#9589d0',
    500: '#645bbb',
    950: '#000000',
  },
}

SCSS

$custom: #645bbb;
$custom-light: #9589d0;
$custom-dark: #000000;

JSON

{
  "hex": "#645bbb",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 245.625,
    "s": 41.379,
    "l": 54.51
  },
  "oklch": {
    "l": 0.52802,
    "c": 0.14594,
    "h": 284.5
  },
  "luminance": 0.13779
}

Semantic roles & 50–950 ramp

primary

#645BBB

secondary

#C9CDA5

accent

#D157C6

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #645BBB

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

Preview Lab → · Contrast checker → · Palette generator →