#556BBB#556BBB

#556BBB is a mid, vivid blue. Relative luminance 0.160; OKLCH L 54.9% C 0.127 H 270.2°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#556BBB
RGB	rgb(85, 107, 187)
HSL	hsl(227, 43%, 53%)
HSV	hsv(227, 55%, 73%)
CMYK	cmyk(54.5%, 42.8%, 0%, 26.7%)
CIE-LAB	lab(47.02, 15.35, -44.77)
CIE-LCH	lch(47.02, 47.33, 288.92°)
OKLab	oklab(54.88% 0.0005 -0.1272)
OKLCH	oklch(54.88% 0.127 270.2)
XYZ	xyz(17.9707, 16.0333, 49.1518)
Luminance	0.1603 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#556BBB #BBA555

analogous

#559EBB #556BBB #7255BB

triadic

#556BBB #BB556B #6BBB55

tetradic

#556BBB #BB559E #BBA555 #55BB72

square

#556BBB #BB559E #BBA555 #55BB72

split-complementary

#556BBB #BB7255 #9EBB55

monochromatic

#2B396B #3C5097 #556BBB #8191CC #ACB7DE

Accessibility & contrast

On white

4.99

#556BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#556BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #556BBB

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##556BBB	#FFFFFF	#000000	##FFFFFF
##556BBB	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4974BE

Deuteranopia (green-blind)

#3D6BB9

Tritanopia (blue-blind)

#1F7C8A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #556bbb;
/* rgb */ color: rgb(85, 107, 187);
/* oklch */ color: oklch(54.9% 0.127 270.2);

Tailwind

colors: {
  custom: {
    50: '#8c95d0',
    500: '#556bbb',
    950: '#000000',
  },
}

SCSS

$custom: #556bbb;
$custom-light: #8c95d0;
$custom-dark: #000000;

JSON

{
  "hex": "#556bbb",
  "rgb": {
    "r": 85,
    "g": 107,
    "b": 187
  },
  "hsl": {
    "h": 227.059,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.54881,
    "c": 0.12718,
    "h": 270.2
  },
  "luminance": 0.16035
}

Semantic roles & 50–950 ramp

primary

#556BBB

secondary

#CCC2A0

accent

#B855D3

background

#F8F9FC

surface

#F0F1F9

border

#CBCBD2

text

#0D0D14

muted

#7D7E82

Preview Lab

Preview with #556BBB

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

Preview Lab → · Contrast checker → · Palette generator →