#555BB9#555BB9

#555BB9 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.5% C 0.146 H 277.2°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#555BB9
RGB	rgb(85, 91, 185)
HSL	hsl(236, 42%, 53%)
HSV	hsv(236, 54%, 73%)
CMYK	cmyk(54.1%, 50.8%, 0%, 27.5%)
CIE-LAB	lab(42.64, 24.72, -50.62)
CIE-LCH	lch(42.64, 56.33, 296.03°)
OKLab	oklab(51.51% 0.0183 -0.1445)
OKLCH	oklch(51.51% 0.146 277.2)
XYZ	xyz(16.2416, 12.9152, 47.5266)
Luminance	0.1292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB9 #B9B355

analogous

#558DB9 #555BB9 #8155B9

triadic

#555BB9 #B9555B #5BB955

tetradic

#555BB9 #B9558D #B9B355 #55B981

square

#555BB9 #B9558D #B9B355 #55B981

split-complementary

#555BB9 #B98155 #8DB955

monochromatic

#2B2F69 #3D4294 #555BB9 #8085CB #ACAFDD

Accessibility & contrast

On white

5.86

#555BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#555BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB9

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB9	#FFFFFF	#000000	##FFFFFF
##555BB9	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B69BC

Deuteranopia (green-blind)

#1E61B7

Tritanopia (blue-blind)

#267081

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #555bb9;
/* rgb */ color: rgb(85, 91, 185);
/* oklch */ color: oklch(51.5% 0.146 277.2);

Tailwind

colors: {
  custom: {
    50: '#8c89cf',
    500: '#555bb9',
    950: '#000000',
  },
}

SCSS

$custom: #555bb9;
$custom-light: #8c89cf;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb9",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 185
  },
  "hsl": {
    "h": 236.4,
    "s": 41.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.51511,
    "c": 0.14566,
    "h": 277.2
  },
  "luminance": 0.12916
}

Semantic roles & 50–950 ramp

primary

#555BB9

secondary

#CBC89F

accent

#CA56D1

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #555BB9

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

Preview Lab → · Contrast checker → · Palette generator →