#1B3289#1B3289

#1B3289 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.147 H 267.0°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B3289
RGB	rgb(27, 50, 137)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 54%)
CMYK	cmyk(80.3%, 63.5%, 0%, 46.3%)
CIE-LAB	lab(24.70, 24.82, -50.93)
CIE-LCH	lch(24.70, 56.66, 295.98°)
OKLab	oklab(36.04% -0.0077 -0.1473)
OKLCH	oklch(36.04% 0.147 267)
XYZ	xyz(6.1064, 4.3197, 24.1740)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3289 #89721B

analogous

#1B6989 #1B3289 #3B1B89

triadic

#1B3289 #891B32 #32891B

tetradic

#1B3289 #891B69 #89721B #1B893B

square

#1B3289 #891B69 #89721B #1B893B

split-complementary

#1B3289 #893B1B #69891B

monochromatic

#070D23 #111F56 #1B3289 #2545BC #4464DA

Accessibility & contrast

On white

11.27

#1B3289 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B3289 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3289

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3289	#FFFFFF	#000000	##FFFFFF
##1B3289	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408C

Deuteranopia (green-blind)

#003687

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3289;
/* rgb */ color: rgb(27, 50, 137);
/* oklch */ color: oklch(36.0% 0.147 267.0);

Tailwind

colors: {
  custom: {
    50: '#6b69ac',
    500: '#1b3289',
    950: '#000000',
  },
}

SCSS

$custom: #1b3289;
$custom-light: #6b69ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3289",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 137
  },
  "hsl": {
    "h": 227.455,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36038,
    "c": 0.14749,
    "h": 267
  },
  "luminance": 0.0432
}

Semantic roles & 50–950 ramp

primary

#1B3289

secondary

#BCA344

accent

#C63EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3289

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

Preview Lab → · Contrast checker → · Palette generator →