#1B5780#1B5780

#1B5780 is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 43.9% C 0.090 H 243.1°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B5780
RGB	rgb(27, 87, 128)
HSL	hsl(204, 65%, 30%)
HSV	hsv(204, 79%, 50%)
CMYK	cmyk(78.9%, 32%, 0%, 49.8%)
CIE-LAB	lab(35.22, -3.90, -28.47)
CIE-LCH	lch(35.22, 28.73, 262.20°)
OKLab	oklab(43.93% -0.041 -0.0807)
OKLCH	oklch(43.93% 0.091 243.1)
XYZ	xyz(7.7550, 8.6070, 21.6705)
Luminance	0.0861 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5780 #80441B

analogous

#1B8076 #1B5780 #1B2580

triadic

#1B5780 #801B57 #57801B

tetradic

#1B5780 #761B80 #80441B #25801B

square

#1B5780 #761B80 #80441B #25801B

split-complementary

#1B5780 #801B25 #80761B

monochromatic

#06121B #10354D #1B5780 #2679B3 #3F99D6

Accessibility & contrast

On white

7.72

#1B5780 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1B5780 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5780

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5780	#FFFFFF	#000000	##FFFFFF
##1B5780	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#445882

Deuteranopia (green-blind)

#364F7F

Tritanopia (blue-blind)

#006166

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b5780;
/* rgb */ color: rgb(27, 87, 128);
/* oklch */ color: oklch(43.9% 0.090 243.1);

Tailwind

colors: {
  custom: {
    50: '#6786a5',
    500: '#1b5780',
    950: '#000000',
  },
}

SCSS

$custom: #1b5780;
$custom-light: #6786a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5780",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 128
  },
  "hsl": {
    "h": 204.356,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.43929,
    "c": 0.0905,
    "h": 243.1
  },
  "luminance": 0.08608
}

Semantic roles & 50–950 ramp

primary

#1B5780

secondary

#B47143

accent

#8440E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5780

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

Preview Lab → · Contrast checker → · Palette generator →