#5B5BB0#5B5BB0

#5B5BB0 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.4% C 0.132 H 280.7°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#5B5BB0
RGB	rgb(91, 91, 176)
HSL	hsl(240, 35%, 52%)
HSV	hsv(240, 48%, 69%)
CMYK	cmyk(48.3%, 48.3%, 0%, 31%)
CIE-LAB	lab(42.52, 23.19, -45.50)
CIE-LCH	lch(42.52, 51.07, 297.01°)
OKLab	oklab(51.36% 0.0245 -0.1293)
OKLCH	oklch(51.36% 0.132 280.7)
XYZ	xyz(15.8896, 12.8401, 42.7070)
Luminance	0.1284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B5BB0 #B0B05B

analogous

#5B86B0 #5B5BB0 #865BB0

triadic

#5B5BB0 #B05B5B #5BB05B

tetradic

#5B5BB0 #B05B86 #B0B05B #5BB086

square

#5B5BB0 #B05B86 #B0B05B #5BB086

split-complementary

#5B5BB0 #B0865B #86B05B

monochromatic

#2F2F62 #43438B #5B5BB0 #8484C4 #AEAED8

Accessibility & contrast

On white

5.89

#5B5BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#5B5BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B5BB0

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B5BB0	#FFFFFF	#000000	##FFFFFF
##5B5BB0	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3668B3

Deuteranopia (green-blind)

#3061AE

Tritanopia (blue-blind)

#3C6D7D

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #5b5bb0;
/* rgb */ color: rgb(91, 91, 176);
/* oklch */ color: oklch(51.4% 0.132 280.7);

Tailwind

colors: {
  custom: {
    50: '#8f89c8',
    500: '#5b5bb0',
    950: '#000000',
  },
}

SCSS

$custom: #5b5bb0;
$custom-light: #8f89c8;
$custom-dark: #000000;

JSON

{
  "hex": "#5b5bb0",
  "rgb": {
    "r": 91,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 240,
    "s": 34.979,
    "l": 52.353
  },
  "oklch": {
    "l": 0.51359,
    "c": 0.13161,
    "h": 280.7
  },
  "luminance": 0.12841
}

Semantic roles & 50–950 ramp

primary

#5B5BB0

secondary

#C6C6A1

accent

#CB5DCB

background

#F9F8FC

surface

#F1F0F8

border

#CBCBD1

text

#0D0B13

muted

#7E7C82

Preview Lab

Preview with #5B5BB0

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

Preview Lab → · Contrast checker → · Palette generator →