#555BBB#555BBB

#555BBB is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.6% C 0.148 H 277.2°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#555BBB
RGB	rgb(85, 91, 187)
HSL	hsl(236, 43%, 53%)
HSV	hsv(236, 55%, 73%)
CMYK	cmyk(54.5%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(42.76, 25.37, -51.58)
CIE-LCH	lch(42.76, 57.48, 296.19°)
OKLab	oklab(51.65% 0.0185 -0.1473)
OKLCH	oklch(51.65% 0.148 277.2)
XYZ	xyz(16.4542, 13.0002, 48.6463)
Luminance	0.1300 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BBB #BBB555

analogous

#558EBB #555BBB #8255BB

triadic

#555BBB #BB555B #5BBB55

tetradic

#555BBB #BB558E #BBB555 #55BB82

square

#555BBB #BB558E #BBB555 #55BB82

split-complementary

#555BBB #BB8255 #8EBB55

monochromatic

#2B2F6B #3C4297 #555BBB #8185CC #ACAFDE

Accessibility & contrast

On white

5.83

#555BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#555BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BBB

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BBB	#FFFFFF	#000000	##FFFFFF
##555BBB	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2969BE

Deuteranopia (green-blind)

#1A61B9

Tritanopia (blue-blind)

#237182

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #555bbb;
/* rgb */ color: rgb(85, 91, 187);
/* oklch */ color: oklch(51.6% 0.148 277.2);

Tailwind

colors: {
  custom: {
    50: '#8d89d0',
    500: '#555bbb',
    950: '#000000',
  },
}

SCSS

$custom: #555bbb;
$custom-light: #8d89d0;
$custom-dark: #000000;

JSON

{
  "hex": "#555bbb",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 236.471,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51649,
    "c": 0.14848,
    "h": 277.2
  },
  "luminance": 0.13001
}

Semantic roles & 50–950 ramp

primary

#555BBB

secondary

#CCC9A0

accent

#CB55D3

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #555BBB

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

Preview Lab → · Contrast checker → · Palette generator →