#1B56BB#1B56BB

#1B56BB is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.8% C 0.171 H 260.6°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B56BB
RGB	rgb(27, 86, 187)
HSL	hsl(218, 75%, 42%)
HSV	hsv(218, 86%, 73%)
CMYK	cmyk(85.6%, 54%, 0%, 26.7%)
CIE-LAB	lab(38.68, 20.23, -58.31)
CIE-LCH	lch(38.68, 61.72, 289.14°)
OKLab	oklab(47.82% -0.0278 -0.1683)
OKLCH	oklch(47.82% 0.171 260.6)
XYZ	xyz(12.7462, 10.4748, 48.3541)
Luminance	0.1048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B56BB #BB801B

analogous

#1BA6BB #1B56BB #301BBB

triadic

#1B56BB #BB1B56 #56BB1B

tetradic

#1B56BB #BB1BA6 #BB801B #1BBB30

square

#1B56BB #BB1BA6 #BB801B #1BBB30

split-complementary

#1B56BB #BB301B #A6BB1B

monochromatic

#0C2550 #133D86 #1B56BB #3273E1 #6797E9

Accessibility & contrast

On white

6.78

#1B56BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#1B56BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B56BB

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B56BB	#FFFFFF	#000000	##FFFFFF
##1B56BB	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063BF

Deuteranopia (green-blind)

#0054B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1b56bb;
/* rgb */ color: rgb(27, 86, 187);
/* oklch */ color: oklch(47.8% 0.171 260.6);

Tailwind

colors: {
  custom: {
    50: '#7584d0',
    500: '#1b56bb',
    950: '#000000',
  },
}

SCSS

$custom: #1b56bb;
$custom-light: #7584d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b56bb",
  "rgb": {
    "r": 27,
    "g": 86,
    "b": 187
  },
  "hsl": {
    "h": 217.875,
    "s": 74.766,
    "l": 41.961
  },
  "oklch": {
    "l": 0.47823,
    "c": 0.17062,
    "h": 260.6
  },
  "luminance": 0.10476
}

Semantic roles & 50–950 ramp

primary

#1B56BB

secondary

#CEA763

accent

#AC36F1

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0A14

muted

#7C7C82

Preview Lab

Preview with #1B56BB

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

Preview Lab → · Contrast checker → · Palette generator →