#5751CF#5751CF

#5751CF is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.5% C 0.188 H 279.6°. Best body text is #FFFFFF at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#5751CF
RGB	rgb(87, 81, 207)
HSL	hsl(243, 57%, 56%)
HSV	hsv(243, 61%, 81%)
CMYK	cmyk(58%, 60.9%, 0%, 18.8%)
CIE-LAB	lab(41.87, 38.40, -64.61)
CIE-LCH	lch(41.87, 75.16, 300.72°)
OKLab	oklab(51.47% 0.0314 -0.1857)
OKLCH	oklch(51.47% 0.188 279.6)
XYZ	xyz(18.1318, 12.4148, 60.4602)
Luminance	0.1242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5751CF #C9CF51

analogous

#518ACF #5751CF #9651CF

triadic

#5751CF #CF5751 #51CF57

tetradic

#5751CF #CF518A #C9CF51 #51CF96

square

#5751CF #CF518A #C9CF51 #51CF96

split-complementary

#5751CF #CF9651 #8ACF51

monochromatic

#282482 #3731B2 #5751CF #8581DC #B4B1E9

Accessibility & contrast

On white

6.03

#5751CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#5751CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5751CF

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5751CF	#FFFFFF	#000000	##FFFFFF
##5751CF	1.00	6.03	3.48	6.03
#FFFFFF	6.03	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D3

Deuteranopia (green-blind)

#005ECC

Tritanopia (blue-blind)

#067088

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #5751cf;
/* rgb */ color: rgb(87, 81, 207);
/* oklch */ color: oklch(51.5% 0.188 279.6);

Tailwind

colors: {
  custom: {
    50: '#9182df',
    500: '#5751cf',
    950: '#000000',
  },
}

SCSS

$custom: #5751cf;
$custom-light: #9182df;
$custom-dark: #000000;

JSON

{
  "hex": "#5751cf",
  "rgb": {
    "r": 87,
    "g": 81,
    "b": 207
  },
  "hsl": {
    "h": 242.857,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.51465,
    "c": 0.18832,
    "h": 279.6
  },
  "luminance": 0.12416
}

Semantic roles & 50–950 ramp

primary

#5751CF

secondary

#D5D8A4

accent

#E048D9

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0E0A15

muted

#7E7C83

Preview Lab

Preview with #5751CF

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

Preview Lab → · Contrast checker → · Palette generator →