#5B57BB#5B57BB

#5B57BB is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.3% C 0.153 H 281.4°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#5B57BB
RGB	rgb(91, 87, 187)
HSL	hsl(242, 42%, 54%)
HSV	hsv(242, 53%, 73%)
CMYK	cmyk(51.3%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(42.20, 29.14, -52.47)
CIE-LCH	lch(42.20, 60.02, 299.05°)
OKLab	oklab(51.34% 0.0301 -0.1498)
OKLCH	oklch(51.34% 0.153 281.4)
XYZ	xyz(16.6895, 12.6275, 48.5620)
Luminance	0.1263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B57BB #B7BB57

analogous

#5785BB #5B57BB #8D57BB

triadic

#5B57BB #BB5B57 #57BB5B

tetradic

#5B57BB #BB5785 #B7BB57 #57BB8D

square

#5B57BB #BB5785 #B7BB57 #57BB8D

split-complementary

#5B57BB #BB8D57 #85BB57

monochromatic

#2E2C6C #413D97 #5B57BB #8683CD #B0AEDE

Accessibility & contrast

On white

5.96

#5B57BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#5B57BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B57BB

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B57BB	#FFFFFF	#000000	##FFFFFF
##5B57BB	1.00	5.96	3.53	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2067BE

Deuteranopia (green-blind)

#1460B9

Tritanopia (blue-blind)

#356D80

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #5b57bb;
/* rgb */ color: rgb(91, 87, 187);
/* oklch */ color: oklch(51.3% 0.153 281.4);

Tailwind

colors: {
  custom: {
    50: '#9086d0',
    500: '#5b57bb',
    950: '#000000',
  },
}

SCSS

$custom: #5b57bb;
$custom-light: #9086d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5b57bb",
  "rgb": {
    "r": 91,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 242.4,
    "s": 42.373,
    "l": 53.725
  },
  "oklch": {
    "l": 0.51337,
    "c": 0.15281,
    "h": 281.4
  },
  "luminance": 0.12628
}

Semantic roles & 50–950 ramp

primary

#5B57BB

secondary

#CBCCA2

accent

#D256CD

background

#F9F8FC

surface

#F2EFF9

border

#CCCAD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #5B57BB

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

Preview Lab → · Contrast checker → · Palette generator →