#1B3F79 Color Information

Hex color code: #1B3F79

#1B3F79 is a serene blue color. In RGB it is (27, 63, 121), and in HSL it is (217°, 64%, 29%). It is popular in mobile app design.

Try:

Color NameDark Slate Blue

HEX

#1B3F79

RGB

27, 63, 121

HSL

217°, 64%, 29%

CMYK

78%, 48%, 0%, 53%

Shades

CSS Usage

color: #1B3F79;
background-color: #1B3F79;
border-color: #1B3F79;
box-shadow: 0 0 10px #1B3F79;
border: 2px solid #1B3F79;

Tailwind Usage

bg-[#1B3F79]
text-[#1B3F79]
border-[#1B3F79]
shadow-[0_0_10px_1B3F79]

Generate Gradient

→

Gradient CSS

background: linear-gradient(90deg, #1B3F79, #FF5733);

Preview in UI

Button

.btn-primary { background-color: #1B3F79; color: #FFFFFF; }

Badge

New Feature

.badge { background-color: #1B3F79; color: #FFFFFF; }

Text Highlight

The quick brown fox jumps over the lazy dog. highlighted text example shows how the color looks as a text highlight.

Card

Card Title

This card uses your color as a border accent.

.card-accent { border: 2px solid #1B3F79; background-color: #1B3F7915; }

Alert / Toast

This is an alert using your color as accent.

.alert { background-color: #1B3F7920; border-left: 4px solid #1B3F79; }

Link / Accent

This is a paragraph with a link using your color. The color can be applied to interactive elements.

a { color: #1B3F79; }

Related Colors

Complementary

Analogous

Triadic

Split Complementary

Tetradic

Monochromatic

Popular Colors

Common HEX Colors

Color Theory

Relationships based on the position of #1B3F79 in the color wheel.

● Current● Complementary● Triadic● Analogous

RGB, HSL and CMYK Values

RGB

27, 63, 121

Red: 27 / Green: 63 / Blue: 121

HSL

217°, 64%, 29%

Hue: 217° / Saturation: 64% / Lightness: 29%

CMYK

78%, 48%, 0%, 53%

Cyan: 78% / Magenta: 48% / Yellow: 0% / Key: 53%

What color is #1B3F79?

#1B3F79 is a blue-purple hue associated with creativity and luxury.

Color Shades

Complementary Colors

79551B

Color Palette

HEX to RGB

Convert #1B3F79 to RGB:

rgb(27, 63, 121)HEX to RGB Converter →

HEX to HSL

Convert #1B3F79 to HSL:

hsl(217, 64%, 29%)RGB to HSL Converter →

HEX to CMYK

Convert #1B3F79 to CMYK:

cmyk(78%, 48%, 0%, 53%)Color Converter →

Color Meaning and Usage

A calming blue tone, #1B3F79 has RGB (27, 63, 121) and HSL (217°, 64%, 29%). Known for evoking creativity and luxury, this blue-purple hue is often used for branding and logos. Lighter variations like #FFFFFF create softer gradients.

The complementary color of #1B3F79 is #79551B, creating high-contrast pairings. For softer combinations, try analogous colors like #1B6E79.

Use #1B3F79 in CSS: color: #1B3F79 or background-color: #1B3F79. Create palettes with Color Palette Generator or check contrast with Contrast Checker.

Contrast with #1B3F79

Sample text on this color - The quick brown fox jumps over the lazy dog.

Contrast Ratio: 2.03:1

WCAG AA: Fail

WCAG AAA: Fail

Need more control? Contrast Checker →

Frequently Asked Questions

What color is #1B3F79?

#1B3F79 is a calming blue color - a blue-purple hue that evokes creativity and luxury.

What is the RGB value of #1B3F79?

#1B3F79 in RGB is (27, 63, 121) - 27 red, 63 green, and 121 blue.

How to use #1B3F79 in CSS?

Use #1B3F79 directly in your CSS properties like color or background-color.

What colors go well with #1B3F79?

#79551B (complementary), #1B6E79 (analogous), and #0D1E3B (lighter shade) work well with #1B3F79.