#1B356A#1B356A

#1B356A is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.0% C 0.098 H 262.7°. Best body text is #FFFFFF at 11.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B356A
RGB	rgb(27, 53, 106)
HSL	hsl(220, 59%, 26%)
HSV	hsv(220, 75%, 42%)
CMYK	cmyk(74.5%, 50%, 0%, 58.4%)
CIE-LAB	lab(23.07, 10.13, -33.93)
CIE-LCH	lch(23.07, 35.41, 286.62°)
OKLab	oklab(34.02% -0.0125 -0.0973)
OKLCH	oklch(34.02% 0.098 262.7)
XYZ	xyz(4.3257, 3.8194, 14.1421)
Luminance	0.0382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B356A #6A501B

analogous

#1B5C6A #1B356A #281B6A

triadic

#1B356A #6A1B35 #356A1B

tetradic

#1B356A #6A1B5C #6A501B #1B6A28

square

#1B356A #6A1B5C #6A501B #1B6A28

split-complementary

#1B356A #6A281B #5C6A1B

monochromatic

#060C18 #0F1D39 #1B356A #274D9B #3466CB

Accessibility & contrast

On white

11.90

#1B356A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1B356A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B356A

11.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B356A	#FFFFFF	#000000	##FFFFFF
##1B356A	1.00	11.90	1.76	11.90
#FFFFFF	11.90	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193B6C

Deuteranopia (green-blind)

#063469

Tritanopia (blue-blind)

#00414A

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b356a;
/* rgb */ color: rgb(27, 53, 106);
/* oklch */ color: oklch(34.0% 0.098 262.7);

Tailwind

colors: {
  custom: {
    50: '#636b95',
    500: '#1b356a',
    950: '#000000',
  },
}

SCSS

$custom: #1b356a;
$custom-light: #636b95;
$custom-dark: #000000;

JSON

{
  "hex": "#1b356a",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 106
  },
  "hsl": {
    "h": 220.253,
    "s": 59.398,
    "l": 26.078
  },
  "oklch": {
    "l": 0.34017,
    "c": 0.09808,
    "h": 262.7
  },
  "luminance": 0.0382
}

Semantic roles & 50–950 ramp

primary

#1B356A

secondary

#9F8042

accent

#AF45E3

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B356A

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

Preview Lab → · Contrast checker → · Palette generator →