#5B57CC#5B57CC

#5B57CC is a mid, vivid blue. Relative luminance 0.134; OKLCH L 52.6% C 0.176 H 280.0°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#5B57CC
RGB	rgb(91, 87, 204)
HSL	hsl(242, 53%, 57%)
HSV	hsv(242, 57%, 80%)
CMYK	cmyk(55.4%, 57.4%, 0%, 20%)
CIE-LAB	lab(43.36, 34.53, -60.45)
CIE-LCH	lch(43.36, 69.62, 299.73°)
OKLab	oklab(52.57% 0.0305 -0.1733)
OKLCH	oklch(52.57% 0.176 280)
XYZ	xyz(18.6183, 13.3990, 58.7202)
Luminance	0.1340 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B57CC #C8CC57

analogous

#578ECC #5B57CC #9557CC

triadic

#5B57CC #CC5B57 #57CC5B

tetradic

#5B57CC #CC578E #C8CC57 #57CC95

square

#5B57CC #CC578E #C8CC57 #57CC95

split-complementary

#5B57CC #CC9557 #8ECC57

monochromatic

#2A2781 #3A36B0 #5B57CC #8986DA #B7B5E9

Accessibility & contrast

On white

5.71

#5B57CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#5B57CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B57CC

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B57CC	#FFFFFF	#000000	##FFFFFF
##5B57CC	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD0

Deuteranopia (green-blind)

#0062CA

Tritanopia (blue-blind)

#227289

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5b57cc;
/* rgb */ color: rgb(91, 87, 204);
/* oklch */ color: oklch(52.6% 0.176 280.0);

Tailwind

colors: {
  custom: {
    50: '#9386dc',
    500: '#5b57cc',
    950: '#000000',
  },
}

SCSS

$custom: #5b57cc;
$custom-light: #9386dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5b57cc",
  "rgb": {
    "r": 91,
    "g": 87,
    "b": 204
  },
  "hsl": {
    "h": 242.051,
    "s": 53.425,
    "l": 57.059
  },
  "oklch": {
    "l": 0.52571,
    "c": 0.17597,
    "h": 280
  },
  "luminance": 0.134
}

Semantic roles & 50–950 ramp

primary

#5B57CC

secondary

#D6D7A8

accent

#DD4BD8

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #5B57CC

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

Preview Lab → · Contrast checker → · Palette generator →