#1B3756#1B3756

#1B3756 is a dark, moderate cyan. Relative luminance 0.036; OKLCH L 33.1% C 0.065 H 252.5°. Best body text is #FFFFFF at 12.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B3756
RGB	rgb(27, 55, 86)
HSL	hsl(212, 52%, 22%)
HSV	hsv(212, 69%, 34%)
CMYK	cmyk(68.6%, 36%, 0%, 66.3%)
CIE-LAB	lab(22.43, 0.65, -21.88)
CIE-LCH	lch(22.43, 21.89, 271.69°)
OKLab	oklab(33.11% -0.0196 -0.0619)
OKLCH	oklch(33.11% 0.065 252.5)
XYZ	xyz(3.4973, 3.6369, 9.3200)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3756 #563A1B

analogous

#1B5556 #1B3756 #1C1B56

triadic

#1B3756 #561B37 #37561B

tetradic

#1B3756 #561B55 #563A1B #1B561C

square

#1B3756 #561B55 #563A1B #1B561C

split-complementary

#1B3756 #561C1B #55561B

monochromatic

#070F17 #0C1927 #1B3756 #2A5585 #3873B3

Accessibility & contrast

On white

12.16

#1B3756 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B3756 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3756

12.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3756	#FFFFFF	#000000	##FFFFFF
##1B3756	1.00	12.16	1.73	12.16
#FFFFFF	12.16	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3957

Deuteranopia (green-blind)

#223355

Tritanopia (blue-blind)

#003E42

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b3756;
/* rgb */ color: rgb(27, 55, 86);
/* oklch */ color: oklch(33.1% 0.065 252.5);

Tailwind

colors: {
  custom: {
    50: '#5e6d86',
    500: '#1b3756',
    950: '#000000',
  },
}

SCSS

$custom: #1b3756;
$custom-light: #5e6d86;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3756",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 86
  },
  "hsl": {
    "h": 211.525,
    "s": 52.212,
    "l": 22.157
  },
  "oklch": {
    "l": 0.33113,
    "c": 0.06492,
    "h": 252.5
  },
  "luminance": 0.03637
}

Semantic roles & 50–950 ramp

primary

#1B3756

secondary

#8C6841

accent

#984CDC

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #1B3756

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

Preview Lab → · Contrast checker → · Palette generator →