#645DB3#645DB3

#645DB3 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.7% C 0.132 H 284.6°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#645DB3
RGB	rgb(100, 93, 179)
HSL	hsl(245, 36%, 53%)
HSV	hsv(245, 48%, 70%)
CMYK	cmyk(44.1%, 48%, 0%, 29.8%)
CIE-LAB	lab(43.93, 25.05, -44.97)
CIE-LCH	lch(43.93, 51.47, 299.12°)
OKLab	oklab(52.66% 0.0332 -0.1275)
OKLCH	oklch(52.66% 0.132 284.6)
XYZ	xyz(17.3042, 13.7920, 44.3894)
Luminance	0.1379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645DB3 #ACB35D

analogous

#5D81B3 #645DB3 #8F5DB3

triadic

#645DB3 #B3645D #5DB364

tetradic

#645DB3 #B35D81 #ACB35D #5DB38F

square

#645DB3 #B35D81 #ACB35D #5DB38F

split-complementary

#645DB3 #B38F5D #81B35D

monochromatic

#343066 #4A438F #645DB3 #8C87C7 #B4B0DA

Accessibility & contrast

On white

5.59

#645DB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#645DB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645DB3

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645DB3	#FFFFFF	#000000	##FFFFFF
##645DB3	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)

#3A6AB6

Deuteranopia (green-blind)

#3765B1

Tritanopia (blue-blind)

#4B6F7F

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645db3;
/* rgb */ color: rgb(100, 93, 179);
/* oklch */ color: oklch(52.7% 0.132 284.6);

Tailwind

colors: {
  custom: {
    50: '#948bca',
    500: '#645db3',
    950: '#000000',
  },
}

SCSS

$custom: #645db3;
$custom-light: #948bca;
$custom-dark: #000000;

JSON

{
  "hex": "#645db3",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 179
  },
  "hsl": {
    "h": 244.884,
    "s": 36.134,
    "l": 53.333
  },
  "oklch": {
    "l": 0.52661,
    "c": 0.13175,
    "h": 284.6
  },
  "luminance": 0.13793
}

Semantic roles & 50–950 ramp

primary

#645DB3

secondary

#C5C8A3

accent

#CC5CC3

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0C13

muted

#7E7D82

Preview Lab

Preview with #645DB3

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

Preview Lab → · Contrast checker → · Palette generator →