#1B345A#1B345A

#1B345A is a dark, moderate blue. Relative luminance 0.034; OKLCH L 32.6% C 0.075 H 258.6°. Best body text is #FFFFFF at 12.46:1 contrast (WCAG AA passes).

Color values

HEX	#1B345A
RGB	rgb(27, 52, 90)
HSL	hsl(216, 54%, 23%)
HSV	hsv(216, 70%, 35%)
CMYK	cmyk(70%, 42.2%, 0%, 64.7%)
CIE-LAB	lab(21.68, 4.33, -25.71)
CIE-LCH	lch(21.68, 26.07, 279.57°)
OKLab	oklab(32.6% -0.0148 -0.0732)
OKLCH	oklch(32.6% 0.075 258.6)
XYZ	xyz(3.5248, 3.4268, 10.1466)
Luminance	0.0343 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B345A #5A411B

analogous

#1B535A #1B345A #211B5A

triadic

#1B345A #5A1B34 #345A1B

tetradic

#1B345A #5A1B53 #5A411B #1B5A21

square

#1B345A #5A1B53 #5A411B #1B5A21

split-complementary

#1B345A #5A211B #535A1B

monochromatic

#070E18 #0D192B #1B345A #294F89 #376AB8

Accessibility & contrast

On white

12.46

#1B345A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B345A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B345A

12.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B345A	#FFFFFF	#000000	##FFFFFF
##1B345A	1.00	12.46	1.69	12.46
#FFFFFF	12.46	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23375C

Deuteranopia (green-blind)

#1A3159

Tritanopia (blue-blind)

#003D42

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b345a;
/* rgb */ color: rgb(27, 52, 90);
/* oklch */ color: oklch(32.6% 0.075 258.6);

Tailwind

colors: {
  custom: {
    50: '#5f6b89',
    500: '#1b345a',
    950: '#000000',
  },
}

SCSS

$custom: #1b345a;
$custom-light: #5f6b89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b345a",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 90
  },
  "hsl": {
    "h": 216.19,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.32602,
    "c": 0.07463,
    "h": 258.6
  },
  "luminance": 0.03427
}

Semantic roles & 50–950 ramp

primary

#1B345A

secondary

#907141

accent

#A34BDD

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B345A

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

Preview Lab → · Contrast checker → · Palette generator →