#5B57CB#5B57CB

#5B57CB is a mid, vivid blue. Relative luminance 0.134; OKLCH L 52.5% C 0.175 H 280.1°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#5B57CB
RGB	rgb(91, 87, 203)
HSL	hsl(242, 53%, 57%)
HSV	hsv(242, 57%, 80%)
CMYK	cmyk(55.2%, 57.1%, 0%, 20.4%)
CIE-LAB	lab(43.29, 34.21, -59.99)
CIE-LCH	lch(43.29, 69.06, 299.69°)
OKLab	oklab(52.5% 0.0305 -0.1719)
OKLCH	oklch(52.5% 0.175 280.1)
XYZ	xyz(18.4987, 13.3511, 58.0906)
Luminance	0.1335 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B57CB #C7CB57

analogous

#578DCB #5B57CB #9557CB

triadic

#5B57CB #CB5B57 #57CB5B

tetradic

#5B57CB #CB578D #C7CB57 #57CB95

square

#5B57CB #CB578D #C7CB57 #57CB95

split-complementary

#5B57CB #CB9557 #8DCB57

monochromatic

#2B2880 #3A36AF #5B57CB #8986D9 #B6B4E8

Accessibility & contrast

On white

5.72

#5B57CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#5B57CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B57CB

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B57CB	#FFFFFF	#000000	##FFFFFF
##5B57CB	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BCF

Deuteranopia (green-blind)

#0062C9

Tritanopia (blue-blind)

#247288

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5b57cb;
/* rgb */ color: rgb(91, 87, 203);
/* oklch */ color: oklch(52.5% 0.175 280.1);

Tailwind

colors: {
  custom: {
    50: '#9386dc',
    500: '#5b57cb',
    950: '#000000',
  },
}

SCSS

$custom: #5b57cb;
$custom-light: #9386dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5b57cb",
  "rgb": {
    "r": 91,
    "g": 87,
    "b": 203
  },
  "hsl": {
    "h": 242.069,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.52496,
    "c": 0.17463,
    "h": 280.1
  },
  "luminance": 0.13352
}

Semantic roles & 50–950 ramp

primary

#5B57CB

secondary

#D5D7A7

accent

#DC4CD7

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #5B57CB

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

Preview Lab → · Contrast checker → · Palette generator →