#1B356C#1B356C

#1B356C is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.2% C 0.101 H 263.1°. Best body text is #FFFFFF at 11.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B356C
RGB	rgb(27, 53, 108)
HSL	hsl(221, 60%, 26%)
HSV	hsv(221, 75%, 42%)
CMYK	cmyk(75%, 50.9%, 0%, 57.6%)
CIE-LAB	lab(23.21, 10.95, -34.99)
CIE-LCH	lch(23.21, 36.66, 287.38°)
OKLab	oklab(34.17% -0.0122 -0.1004)
OKLCH	oklch(34.17% 0.101 263.1)
XYZ	xyz(4.4309, 3.8615, 14.6963)
Luminance	0.0386 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B356C #6C521B

analogous

#1B5E6C #1B356C #2A1B6C

triadic

#1B356C #6C1B35 #356C1B

tetradic

#1B356C #6C1B5E #6C521B #1B6C2A

square

#1B356C #6C1B5E #6C521B #1B6C2A

split-complementary

#1B356C #6C2A1B #5E6C1B

monochromatic

#060C18 #0F1D3B #1B356C #274D9D #3566CC

Accessibility & contrast

On white

11.85

#1B356C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B356C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B356C

11.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B356C	#FFFFFF	#000000	##FFFFFF
##1B356C	1.00	11.85	1.77	11.85
#FFFFFF	11.85	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#173B6E

Deuteranopia (green-blind)

#02346B

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b356c;
/* rgb */ color: rgb(27, 53, 108);
/* oklch */ color: oklch(34.2% 0.101 263.1);

Tailwind

colors: {
  custom: {
    50: '#636b96',
    500: '#1b356c',
    950: '#000000',
  },
}

SCSS

$custom: #1b356c;
$custom-light: #636b96;
$custom-dark: #000000;

JSON

{
  "hex": "#1b356c",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 108
  },
  "hsl": {
    "h": 220.741,
    "s": 60,
    "l": 26.471
  },
  "oklch": {
    "l": 0.34172,
    "c": 0.10112,
    "h": 263.1
  },
  "luminance": 0.03862
}

Semantic roles & 50–950 ramp

primary

#1B356C

secondary

#A18242

accent

#B045E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B356C

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

Preview Lab → · Contrast checker → · Palette generator →