#5B5BCB#5B5BCB

#5B5BCB is a mid, vivid blue. Relative luminance 0.140; OKLCH L 53.2% C 0.169 H 279.0°. Best body text is #FFFFFF at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#5B5BCB
RGB	rgb(91, 91, 203)
HSL	hsl(240, 52%, 58%)
HSV	hsv(240, 55%, 80%)
CMYK	cmyk(55.2%, 55.2%, 0%, 20.4%)
CIE-LAB	lab(44.26, 31.76, -58.42)
CIE-LCH	lch(44.26, 66.50, 298.53°)
OKLab	oklab(53.22% 0.0264 -0.1673)
OKLCH	oklch(53.22% 0.169 279)
XYZ	xyz(18.8316, 14.0169, 58.2015)
Luminance	0.1402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B5BCB #CBCB5B

analogous

#5B93CB #5B5BCB #935BCB

triadic

#5B5BCB #CB5B5B #5BCB5B

tetradic

#5B5BCB #CB5B93 #CBCB5B #5BCB93

square

#5B5BCB #CB5B93 #CBCB5B #5BCB93

split-complementary

#5B5BCB #CB935B #93CB5B

monochromatic

#292982 #3838B1 #5B5BCB #8989DA #B8B8E8

Accessibility & contrast

On white

5.52

#5B5BCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#5B5BCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B5BCB

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B5BCB	#FFFFFF	#000000	##FFFFFF
##5B5BCB	1.00	5.52	3.80	5.52
#FFFFFF	5.52	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C6DCF

Deuteranopia (green-blind)

#0064C9

Tritanopia (blue-blind)

#23758A

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #5b5bcb;
/* rgb */ color: rgb(91, 91, 203);
/* oklch */ color: oklch(53.2% 0.169 279.0);

Tailwind

colors: {
  custom: {
    50: '#9289dc',
    500: '#5b5bcb',
    950: '#000000',
  },
}

SCSS

$custom: #5b5bcb;
$custom-light: #9289dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5b5bcb",
  "rgb": {
    "r": 91,
    "g": 91,
    "b": 203
  },
  "hsl": {
    "h": 240,
    "s": 51.852,
    "l": 57.647
  },
  "oklch": {
    "l": 0.53217,
    "c": 0.16937,
    "h": 279
  },
  "luminance": 0.14018
}

Semantic roles & 50–950 ramp

primary

#5B5BCB

secondary

#D7D7AA

accent

#DB4CDB

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #5B5BCB

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

Preview Lab → · Contrast checker → · Palette generator →