#556EBB#556EBB

#556EBB is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.5% C 0.123 H 268.6°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#556EBB
RGB	rgb(85, 110, 187)
HSL	hsl(225, 43%, 53%)
HSV	hsv(225, 55%, 73%)
CMYK	cmyk(54.5%, 41.2%, 0%, 26.7%)
CIE-LAB	lab(47.84, 13.48, -43.46)
CIE-LCH	lch(47.84, 45.51, 287.23°)
OKLab	oklab(55.51% -0.003 -0.1233)
OKLCH	oklch(55.51% 0.123 268.6)
XYZ	xyz(18.2889, 16.6697, 49.2579)
Luminance	0.1667 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#556EBB #BBA255

analogous

#55A1BB #556EBB #6F55BB

triadic

#556EBB #BB556E #6EBB55

tetradic

#556EBB #BB55A1 #BBA255 #55BB6F

square

#556EBB #BB55A1 #BBA255 #55BB6F

split-complementary

#556EBB #BB6F55 #A1BB55

monochromatic

#2B3A6B #3C5297 #556EBB #8193CC #ACB9DE

Accessibility & contrast

On white

4.85

#556EBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#556EBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #556EBB

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##556EBB	#FFFFFF	#000000	##FFFFFF
##556EBB	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E76BE

Deuteranopia (green-blind)

#426DB9

Tritanopia (blue-blind)

#1E7F8B

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #556ebb;
/* rgb */ color: rgb(85, 110, 187);
/* oklch */ color: oklch(55.5% 0.123 268.6);

Tailwind

colors: {
  custom: {
    50: '#8c97d0',
    500: '#556ebb',
    950: '#000000',
  },
}

SCSS

$custom: #556ebb;
$custom-light: #8c97d0;
$custom-dark: #000000;

JSON

{
  "hex": "#556ebb",
  "rgb": {
    "r": 85,
    "g": 110,
    "b": 187
  },
  "hsl": {
    "h": 225.294,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.55513,
    "c": 0.12336,
    "h": 268.6
  },
  "luminance": 0.16671
}

Semantic roles & 50–950 ramp

primary

#556EBB

secondary

#CCC1A0

accent

#B455D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0D14

muted

#7D7E82

Preview Lab

Preview with #556EBB

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

Preview Lab → · Contrast checker → · Palette generator →