#645ECF#645ECF

#645ECF is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.7% C 0.169 H 281.6°. Best body text is #FFFFFF at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#645ECF
RGB	rgb(100, 94, 207)
HSL	hsl(243, 54%, 59%)
HSV	hsv(243, 55%, 81%)
CMYK	cmyk(51.7%, 54.6%, 0%, 18.8%)
CIE-LAB	lab(45.93, 32.99, -57.98)
CIE-LCH	lch(45.93, 66.71, 299.64°)
OKLab	oklab(54.72% 0.0341 -0.1657)
OKLCH	oklch(54.72% 0.169 281.6)
XYZ	xyz(20.5173, 15.2186, 60.8757)
Luminance	0.1522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645ECF #C9CF5E

analogous

#5E91CF #645ECF #9D5ECF

triadic

#645ECF #CF645E #5ECF64

tetradic

#645ECF #CF5E91 #C9CF5E #5ECF9D

square

#645ECF #CF5E91 #C9CF5E #5ECF9D

split-complementary

#645ECF #CF9D5E #91CF5E

monochromatic

#2E298A #3E37B9 #645ECF #918DDD #BFBCEB

Accessibility & contrast

On white

5.19

#645ECF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#645ECF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645ECF

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645ECF	#FFFFFF	#000000	##FFFFFF
##645ECF	1.00	5.19	4.04	5.19
#FFFFFF	5.19	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1871D3

Deuteranopia (green-blind)

#0369CD

Tritanopia (blue-blind)

#38788D

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #645ecf;
/* rgb */ color: rgb(100, 94, 207);
/* oklch */ color: oklch(54.7% 0.169 281.6);

Tailwind

colors: {
  custom: {
    50: '#988cde',
    500: '#645ecf',
    950: '#000000',
  },
}

SCSS

$custom: #645ecf;
$custom-light: #988cde;
$custom-dark: #000000;

JSON

{
  "hex": "#645ecf",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 207
  },
  "hsl": {
    "h": 243.186,
    "s": 54.067,
    "l": 59.02
  },
  "oklch": {
    "l": 0.54721,
    "c": 0.16921,
    "h": 281.6
  },
  "luminance": 0.1522
}

Semantic roles & 50–950 ramp

primary

#645ECF

secondary

#D8DBAE

accent

#DD4AD6

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #645ECF

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

Preview Lab → · Contrast checker → · Palette generator →