#1B313B Color Information

Hex color code: #1B313B

A dramatic blue shade, #1B313B appears as (27, 49, 59) in RGB and (199°, 37%, 17%) in HSL. It is typically applied in digital products.

Try:

Color NameDark Slate Gray

HEX

#1B313B

RGB

27, 49, 59

HSL

199°, 37%, 17%

CMYK

54%, 17%, 0%, 77%

Shades

CSS Usage

color: #1B313B;
background-color: #1B313B;
border-color: #1B313B;
box-shadow: 0 0 10px #1B313B;
border: 2px solid #1B313B;

Tailwind Usage

bg-[#1B313B]
text-[#1B313B]
border-[#1B313B]
shadow-[0_0_10px_1B313B]

Generate Gradient

→

Gradient CSS

background: linear-gradient(90deg, #1B313B, #FF5733);

Preview in UI

Button

.btn-primary { background-color: #1B313B; color: #FFFFFF; }

Badge

New Feature

.badge { background-color: #1B313B; 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 #1B313B; background-color: #1B313B15; }

Alert / Toast

This is an alert using your color as accent.

.alert { background-color: #1B313B20; border-left: 4px solid #1B313B; }

Link / Accent

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

a { color: #1B313B; }

Related Colors

Complementary

Analogous

Triadic

Split Complementary

Tetradic

Monochromatic

Popular Colors

Common HEX Colors

Color Theory

Relationships based on the position of #1B313B in the color wheel.

● Current● Complementary● Triadic● Analogous

RGB, HSL and CMYK Values

RGB

27, 49, 59

Red: 27 / Green: 49 / Blue: 59

HSL

199°, 37%, 17%

Hue: 199° / Saturation: 37% / Lightness: 17%

CMYK

54%, 17%, 0%, 77%

Cyan: 54% / Magenta: 17% / Yellow: 0% / Key: 77%

What color is #1B313B?

#1B313B is a very dark shade associated with sophistication and elegance.

Color Shades

Complementary Colors

3B251B

Color Palette

HEX to RGB

Convert #1B313B to RGB:

rgb(27, 49, 59)HEX to RGB Converter →

HEX to HSL

Convert #1B313B to HSL:

hsl(199, 37%, 17%)RGB to HSL Converter →

HEX to CMYK

Convert #1B313B to CMYK:

cmyk(54%, 17%, 0%, 77%)Color Converter →

Color Meaning and Usage

A rich blue tone, #1B313B has RGB (27, 49, 59) and HSL (199°, 37%, 17%). Known for evoking sophistication and elegance, this very dark shade is frequently seen in web interfaces. Lighter variations like #FFFFFF create softer gradients.

The complementary color of #1B313B is #3B251B, creating high-contrast pairings. For softer combinations, try analogous colors like #1B3B36.

Use #1B313B in CSS: color: #1B313B or background-color: #1B313B. Create palettes with Color Palette Generator or check contrast with Contrast Checker.

Contrast with #1B313B

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

Contrast Ratio: 1.55:1

WCAG AA: Fail

WCAG AAA: Fail

Need more control? Contrast Checker →

Frequently Asked Questions

What color is #1B313B?

#1B313B is a rich blue color - a very dark shade that evokes sophistication and elegance.

What is the RGB value of #1B313B?

#1B313B in RGB is (27, 49, 59) - 27 red, 49 green, and 59 blue.

How to use #1B313B in CSS?

Use #1B313B directly in your CSS properties like color or background-color.

What colors go well with #1B313B?

#3B251B (complementary), #1B3B36 (analogous), and #030607 (lighter shade) work well with #1B313B.