#645FCC#645FCC

#645FCC is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.7% C 0.164 H 281.6°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#645FCC
RGB	rgb(100, 95, 204)
HSL	hsl(243, 52%, 59%)
HSV	hsv(243, 53%, 80%)
CMYK	cmyk(51%, 53.4%, 0%, 20%)
CIE-LAB	lab(45.98, 31.45, -56.19)
CIE-LCH	lch(45.98, 64.39, 299.24°)
OKLab	oklab(54.69% 0.0329 -0.1604)
OKLCH	oklch(54.69% 0.164 281.6)
XYZ	xyz(20.2435, 15.2522, 58.9923)
Luminance	0.1525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645FCC #C7CC5F

analogous

#5F90CC #645FCC #9A5FCC

triadic

#645FCC #CC645F #5FCC64

tetradic

#645FCC #CC5F90 #C7CC5F #5FCC9A

square

#645FCC #CC5F90 #C7CC5F #5FCC9A

split-complementary

#645FCC #CC9A5F #90CC5F

monochromatic

#2F2B86 #3F39B4 #645FCC #918DDB #BEBCEA

Accessibility & contrast

On white

5.18

#645FCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#645FCC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645FCC

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645FCC	#FFFFFF	#000000	##FFFFFF
##645FCC	1.00	5.18	4.05	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2271D0

Deuteranopia (green-blind)

#1569CA

Tritanopia (blue-blind)

#3B778C

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #645fcc;
/* rgb */ color: rgb(100, 95, 204);
/* oklch */ color: oklch(54.7% 0.164 281.6);

Tailwind

colors: {
  custom: {
    50: '#978cdc',
    500: '#645fcc',
    950: '#000000',
  },
}

SCSS

$custom: #645fcc;
$custom-light: #978cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#645fcc",
  "rgb": {
    "r": 100,
    "g": 95,
    "b": 204
  },
  "hsl": {
    "h": 242.752,
    "s": 51.659,
    "l": 58.627
  },
  "oklch": {
    "l": 0.54692,
    "c": 0.16378,
    "h": 281.6
  },
  "luminance": 0.15253
}

Semantic roles & 50–950 ramp

primary

#645FCC

secondary

#D7D9AE

accent

#DB4DD5

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #645FCC

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

Preview Lab → · Contrast checker → · Palette generator →