#645DBB#645DBB

#645DBB is a mid, vivid blue. Relative luminance 0.141; OKLCH L 53.2% C 0.143 H 283.8°. Best body text is #FFFFFF at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#645DBB
RGB	rgb(100, 93, 187)
HSL	hsl(244, 41%, 55%)
HSV	hsv(244, 50%, 73%)
CMYK	cmyk(46.5%, 50.3%, 0%, 26.7%)
CIE-LAB	lab(44.41, 27.46, -48.87)
CIE-LCH	lch(44.41, 56.06, 299.33°)
OKLab	oklab(53.18% 0.0341 -0.139)
OKLCH	oklch(53.18% 0.143 283.8)
XYZ	xyz(18.1369, 14.1250, 48.7748)
Luminance	0.1413 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645DBB #B4BB5D

analogous

#5D85BB #645DBB #935DBB

triadic

#645DBB #BB645D #5DBB64

tetradic

#645DBB #BB5D85 #B4BB5D #5DBB93

square

#645DBB #BB5D85 #B4BB5D #5DBB93

split-complementary

#645DBB #BB935D #85BB5D

monochromatic

#332F6F #47419A #645DBB #8D88CD #B6B3DF

Accessibility & contrast

On white

5.49

#645DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#645DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645DBB

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645DBB	#FFFFFF	#000000	##FFFFFF
##645DBB	1.00	5.49	3.83	5.49
#FFFFFF	5.49	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#336CBE

Deuteranopia (green-blind)

#2E66B9

Tritanopia (blue-blind)

#477183

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #645dbb;
/* rgb */ color: rgb(100, 93, 187);
/* oklch */ color: oklch(53.2% 0.143 283.8);

Tailwind

colors: {
  custom: {
    50: '#958bd0',
    500: '#645dbb',
    950: '#000000',
  },
}

SCSS

$custom: #645dbb;
$custom-light: #958bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#645dbb",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 187
  },
  "hsl": {
    "h": 244.468,
    "s": 40.87,
    "l": 54.902
  },
  "oklch": {
    "l": 0.53176,
    "c": 0.14307,
    "h": 283.8
  },
  "luminance": 0.14126
}

Semantic roles & 50–950 ramp

primary

#645DBB

secondary

#CBCEA6

accent

#D157C8

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C14

muted

#7E7D82

Preview Lab

Preview with #645DBB

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

Preview Lab → · Contrast checker → · Palette generator →