#1B1D31 Color Information

Hex color code: #1B1D31

#1B1D31 is a dramatic blue color. In RGB it is (27, 29, 49), and in HSL it is (235°, 29%, 15%). It is widely used in graphic design.

Try:

Color NameDark Slate Gray

HEX

#1B1D31

RGB

27, 29, 49

HSL

235°, 29%, 15%

CMYK

45%, 41%, 0%, 81%

Shades

CSS Usage

color: #1B1D31;
background-color: #1B1D31;
border-color: #1B1D31;
box-shadow: 0 0 10px #1B1D31;
border: 2px solid #1B1D31;

Tailwind Usage

bg-[#1B1D31]
text-[#1B1D31]
border-[#1B1D31]
shadow-[0_0_10px_1B1D31]

Generate Gradient

→

Gradient CSS

background: linear-gradient(90deg, #1B1D31, #FF5733);

Preview in UI

Button

.btn-primary { background-color: #1B1D31; color: #FFFFFF; }

Badge

New Feature

.badge { background-color: #1B1D31; 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 #1B1D31; background-color: #1B1D3115; }

Alert / Toast

This is an alert using your color as accent.

.alert { background-color: #1B1D3120; border-left: 4px solid #1B1D31; }

Link / Accent

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

a { color: #1B1D31; }

Related Colors

Complementary

Analogous

Triadic

Split Complementary

Tetradic

Monochromatic

Popular Colors

Common HEX Colors

Color Theory

Relationships based on the position of #1B1D31 in the color wheel.

● Current● Complementary● Triadic● Analogous

RGB, HSL and CMYK Values

RGB

27, 29, 49

Red: 27 / Green: 29 / Blue: 49

HSL

235°, 29%, 15%

Hue: 235° / Saturation: 29% / Lightness: 15%

CMYK

45%, 41%, 0%, 81%

Cyan: 45% / Magenta: 41% / Yellow: 0% / Key: 81%

What color is #1B1D31?

#1B1D31 is a very dark shade associated with sophistication and elegance.

Color Shades

Complementary Colors

312F1B

Color Palette

HEX to RGB

Convert #1B1D31 to RGB:

rgb(27, 29, 49)HEX to RGB Converter →

HEX to HSL

Convert #1B1D31 to HSL:

hsl(235, 29%, 15%)RGB to HSL Converter →

HEX to CMYK

Convert #1B1D31 to CMYK:

cmyk(45%, 41%, 0%, 81%)Color Converter →

Color Meaning and Usage

A rich blue tone, #1B1D31 has RGB (27, 29, 49) and HSL (235°, 29%, 15%). Known for evoking sophistication and elegance, this very dark shade is typically applied in digital products. Lighter variations like #FFFFFF create softer gradients.

The complementary color of #1B1D31 is #312F1B, creating high-contrast pairings. For softer combinations, try analogous colors like #1B2831.

Use #1B1D31 in CSS: color: #1B1D31 or background-color: #1B1D31. Create palettes with Color Palette Generator or check contrast with Contrast Checker.

Contrast with #1B1D31

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

Contrast Ratio: 1.27:1

WCAG AA: Fail

WCAG AAA: Fail

Need more control? Contrast Checker →

Frequently Asked Questions

What color is #1B1D31?

#1B1D31 is a rich blue color - a very dark shade that evokes sophistication and elegance.

What is the RGB value of #1B1D31?

#1B1D31 in RGB is (27, 29, 49) - 27 red, 29 green, and 49 blue.

How to use #1B1D31 in CSS?

Use #1B1D31 directly in your CSS properties like color or background-color.

What colors go well with #1B1D31?

#312F1B (complementary), #1B2831 (analogous), and #000000 (lighter shade) work well with #1B1D31.