#645CEF#645CEF

#645CEF is a mid, highly saturated blue. Relative luminance 0.166; OKLCH L 56.8% C 0.213 H 279.6°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#645CEF
RGB	rgb(100, 92, 239)
HSL	hsl(243, 82%, 65%)
HSV	hsv(243, 62%, 94%)
CMYK	cmyk(58.2%, 61.5%, 0%, 6.3%)
CIE-LAB	lab(47.74, 44.13, -73.20)
CIE-LCH	lch(47.74, 85.47, 301.09°)
OKLab	oklab(56.78% 0.0355 -0.2105)
OKLCH	oklch(56.78% 0.213 279.6)
XYZ	xyz(24.6577, 16.5939, 83.5482)
Luminance	0.1660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CEF #E7EF5C

analogous

#5C9EEF #645CEF #AD5CEF

triadic

#645CEF #EF645C #5CEF64

tetradic

#645CEF #EF5C9E #E7EF5C #5CEFAD

square

#645CEF #EF5C9E #E7EF5C #5CEFAD

split-complementary

#645CEF #EFAD5C #9EEF5C

monochromatic

#1C13BE #2F24EA #645CEF #9994F4 #CECBFA

Accessibility & contrast

On white

4.86

#645CEF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#645CEF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CEF

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CEF	#FFFFFF	#000000	##FFFFFF
##645CEF	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0077F4

Deuteranopia (green-blind)

#006CEC

Tritanopia (blue-blind)

#00809D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #645cef;
/* rgb */ color: rgb(100, 92, 239);
/* oklch */ color: oklch(56.8% 0.213 279.6);

Tailwind

colors: {
  custom: {
    50: '#9d8bf5',
    500: '#645cef',
    950: '#000000',
  },
}

SCSS

$custom: #645cef;
$custom-light: #9d8bf5;
$custom-dark: #000000;

JSON

{
  "hex": "#645cef",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 239
  },
  "hsl": {
    "h": 243.265,
    "s": 82.123,
    "l": 64.902
  },
  "oklch": {
    "l": 0.56776,
    "c": 0.21346,
    "h": 279.6
  },
  "luminance": 0.16596
}

Semantic roles & 50–950 ramp

primary

#645CEF

secondary

#EAECBA

accent

#DF07D3

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #645CEF

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

Preview Lab → · Contrast checker → · Palette generator →