#555CBB#555CBB

#555CBB is a mid, vivid blue. Relative luminance 0.132; OKLCH L 51.8% C 0.147 H 276.8°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#555CBB
RGB	rgb(85, 92, 187)
HSL	hsl(236, 43%, 53%)
HSV	hsv(236, 55%, 73%)
CMYK	cmyk(54.5%, 50.8%, 0%, 26.7%)
CIE-LAB	lab(43.02, 24.75, -51.16)
CIE-LCH	lch(43.02, 56.83, 295.81°)
OKLab	oklab(51.84% 0.0174 -0.1461)
OKLCH	oklch(51.84% 0.147 276.8)
XYZ	xyz(16.5402, 13.1724, 48.6750)
Luminance	0.1317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555CBB #BBB455

analogous

#558FBB #555CBB #8155BB

triadic

#555CBB #BB555C #5CBB55

tetradic

#555CBB #BB558F #BBB455 #55BB81

square

#555CBB #BB558F #BBB455 #55BB81

split-complementary

#555CBB #BB8155 #8FBB55

monochromatic

#2B2F6B #3C4297 #555CBB #8186CC #ACB0DE

Accessibility & contrast

On white

5.78

#555CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#555CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555CBB

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555CBB	#FFFFFF	#000000	##FFFFFF
##555CBB	1.00	5.78	3.63	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C6ABE

Deuteranopia (green-blind)

#1D62B9

Tritanopia (blue-blind)

#237183

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #555cbb;
/* rgb */ color: rgb(85, 92, 187);
/* oklch */ color: oklch(51.8% 0.147 276.8);

Tailwind

colors: {
  custom: {
    50: '#8d8ad0',
    500: '#555cbb',
    950: '#000000',
  },
}

SCSS

$custom: #555cbb;
$custom-light: #8d8ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#555cbb",
  "rgb": {
    "r": 85,
    "g": 92,
    "b": 187
  },
  "hsl": {
    "h": 235.882,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51843,
    "c": 0.14712,
    "h": 276.8
  },
  "luminance": 0.13173
}

Semantic roles & 50–950 ramp

primary

#555CBB

secondary

#CCC9A0

accent

#CA55D3

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #555CBB

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

Preview Lab → · Contrast checker → · Palette generator →