#645DB4#645DB4

#645DB4 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.7% C 0.133 H 284.5°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#645DB4
RGB	rgb(100, 93, 180)
HSL	hsl(245, 37%, 54%)
HSV	hsv(245, 48%, 71%)
CMYK	cmyk(44.4%, 48.3%, 0%, 29.4%)
CIE-LAB	lab(43.99, 25.35, -45.46)
CIE-LCH	lch(43.99, 52.05, 299.15°)
OKLab	oklab(52.72% 0.0334 -0.1289)
OKLCH	oklch(52.72% 0.133 284.5)
XYZ	xyz(17.4057, 13.8326, 44.9240)
Luminance	0.1383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645DB4 #ADB45D

analogous

#5D81B4 #645DB4 #8F5DB4

triadic

#645DB4 #B4645D #5DB464

tetradic

#645DB4 #B45D81 #ADB45D #5DB48F

square

#645DB4 #B45D81 #ADB45D #5DB48F

split-complementary

#645DB4 #B48F5D #81B45D

monochromatic

#343067 #494391 #645DB4 #8C87C7 #B4B1DB

Accessibility & contrast

On white

5.58

#645DB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#645DB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645DB4

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645DB4	#FFFFFF	#000000	##FFFFFF
##645DB4	1.00	5.58	3.77	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396BB7

Deuteranopia (green-blind)

#3665B2

Tritanopia (blue-blind)

#4B6F80

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645db4;
/* rgb */ color: rgb(100, 93, 180);
/* oklch */ color: oklch(52.7% 0.133 284.5);

Tailwind

colors: {
  custom: {
    50: '#958bcb',
    500: '#645db4',
    950: '#000000',
  },
}

SCSS

$custom: #645db4;
$custom-light: #958bcb;
$custom-dark: #000000;

JSON

{
  "hex": "#645db4",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 180
  },
  "hsl": {
    "h": 244.828,
    "s": 36.709,
    "l": 53.529
  },
  "oklch": {
    "l": 0.52724,
    "c": 0.13317,
    "h": 284.5
  },
  "luminance": 0.13833
}

Semantic roles & 50–950 ramp

primary

#645DB4

secondary

#C6C9A4

accent

#CD5BC4

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0C13

muted

#7E7D82

Preview Lab

Preview with #645DB4

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

Preview Lab → · Contrast checker → · Palette generator →