#1B3389#1B3389

#1B3389 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.146 H 266.7°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B3389
RGB	rgb(27, 51, 137)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 54%)
CMYK	cmyk(80.3%, 62.8%, 0%, 46.3%)
CIE-LAB	lab(24.97, 24.13, -50.49)
CIE-LCH	lch(24.97, 55.96, 295.54°)
OKLab	oklab(36.24% -0.0084 -0.146)
OKLCH	oklch(36.24% 0.146 266.7)
XYZ	xyz(6.1496, 4.4061, 24.1884)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3389 #89711B

analogous

#1B6A89 #1B3389 #3A1B89

triadic

#1B3389 #891B33 #33891B

tetradic

#1B3389 #891B6A #89711B #1B893A

square

#1B3389 #891B6A #89711B #1B893A

split-complementary

#1B3389 #893A1B #6A891B

monochromatic

#070D23 #112056 #1B3389 #2546BC #4465DA

Accessibility & contrast

On white

11.16

#1B3389 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B3389 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3389

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3389	#FFFFFF	#000000	##FFFFFF
##1B3389	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418C

Deuteranopia (green-blind)

#003687

Tritanopia (blue-blind)

#004959

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3389;
/* rgb */ color: rgb(27, 51, 137);
/* oklch */ color: oklch(36.2% 0.146 266.7);

Tailwind

colors: {
  custom: {
    50: '#6b6aac',
    500: '#1b3389',
    950: '#000000',
  },
}

SCSS

$custom: #1b3389;
$custom-light: #6b6aac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3389",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 137
  },
  "hsl": {
    "h": 226.909,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36238,
    "c": 0.14622,
    "h": 266.7
  },
  "luminance": 0.04407
}

Semantic roles & 50–950 ramp

primary

#1B3389

secondary

#BCA244

accent

#C43EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3389

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

Preview Lab → · Contrast checker → · Palette generator →