#645BCF#645BCF

#645BCF is a mid, vivid blue. Relative luminance 0.147; OKLCH L 54.2% C 0.173 H 282.4°. Best body text is #FFFFFF at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#645BCF
RGB	rgb(100, 91, 207)
HSL	hsl(245, 55%, 58%)
HSV	hsv(245, 56%, 81%)
CMYK	cmyk(51.7%, 56%, 0%, 18.8%)
CIE-LAB	lab(45.21, 34.80, -59.14)
CIE-LCH	lch(45.21, 68.62, 300.48°)
OKLab	oklab(54.19% 0.0373 -0.1692)
OKLCH	oklch(54.19% 0.173 282.4)
XYZ	xyz(20.2557, 14.6954, 60.7885)
Luminance	0.1470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BCF #C6CF5B

analogous

#5B8CCF #645BCF #9E5BCF

triadic

#645BCF #CF645B #5BCF64

tetradic

#645BCF #CF5B8C #C6CF5B #5BCF9E

square

#645BCF #CF5B8C #C6CF5B #5BCF9E

split-complementary

#645BCF #CF9E5B #8CCF5B

monochromatic

#2F2888 #4036B7 #645BCF #918ADD #BDBAEB

Accessibility & contrast

On white

5.33

#645BCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.94

#645BCF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BCF

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BCF	#FFFFFF	#000000	##FFFFFF
##645BCF	1.00	5.33	3.94	5.33
#FFFFFF	5.33	1.00	21.00	1.00
#000000	3.94	21.00	1.00	21.00
##FFFFFF	5.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#066FD3

Deuteranopia (green-blind)

#0067CD

Tritanopia (blue-blind)

#39758C

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #645bcf;
/* rgb */ color: rgb(100, 91, 207);
/* oklch */ color: oklch(54.2% 0.173 282.4);

Tailwind

colors: {
  custom: {
    50: '#9889de',
    500: '#645bcf',
    950: '#000000',
  },
}

SCSS

$custom: #645bcf;
$custom-light: #9889de;
$custom-dark: #000000;

JSON

{
  "hex": "#645bcf",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 207
  },
  "hsl": {
    "h": 244.655,
    "s": 54.717,
    "l": 58.431
  },
  "oklch": {
    "l": 0.54187,
    "c": 0.17323,
    "h": 282.4
  },
  "luminance": 0.14696
}

Semantic roles & 50–950 ramp

primary

#645BCF

secondary

#D6DAAC

accent

#DE4AD3

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BCF

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

Preview Lab → · Contrast checker → · Palette generator →