#645BCA#645BCA

#645BCA is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.8% C 0.167 H 282.9°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#645BCA
RGB	rgb(100, 91, 202)
HSL	hsl(245, 51%, 57%)
HSV	hsv(245, 55%, 79%)
CMYK	cmyk(50.5%, 55%, 0%, 20.8%)
CIE-LAB	lab(44.88, 33.27, -56.81)
CIE-LCH	lch(44.88, 65.83, 300.35°)
OKLab	oklab(53.83% 0.0372 -0.1623)
OKLCH	oklch(53.83% 0.167 282.9)
XYZ	xyz(19.6541, 14.4547, 57.6201)
Luminance	0.1446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BCA #C1CA5B

analogous

#5B89CA #645BCA #9C5BCA

triadic

#645BCA #CA645B #5BCA64

tetradic

#645BCA #CA5B89 #C1CA5B #5BCA9C

square

#645BCA #CA5B89 #C1CA5B #5BCA9C

split-complementary

#645BCA #CA9C5B #89CA5B

monochromatic

#312A81 #4239AF #645BCA #9089D9 #BBB8E8

Accessibility & contrast

On white

5.40

#645BCA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#645BCA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BCA

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BCA	#FFFFFF	#000000	##FFFFFF
##645BCA	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#176ECE

Deuteranopia (green-blind)

#0766C8

Tritanopia (blue-blind)

#3D748A

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bca;
/* rgb */ color: rgb(100, 91, 202);
/* oklch */ color: oklch(53.8% 0.167 282.9);

Tailwind

colors: {
  custom: {
    50: '#9789db',
    500: '#645bca',
    950: '#000000',
  },
}

SCSS

$custom: #645bca;
$custom-light: #9789db;
$custom-dark: #000000;

JSON

{
  "hex": "#645bca",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 202
  },
  "hsl": {
    "h": 244.865,
    "s": 51.152,
    "l": 57.451
  },
  "oklch": {
    "l": 0.53831,
    "c": 0.16652,
    "h": 282.9
  },
  "luminance": 0.14456
}

Semantic roles & 50–950 ramp

primary

#645BCA

secondary

#D3D7AA

accent

#DB4DCF

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BCA

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

Preview Lab → · Contrast checker → · Palette generator →