#151B37 Color Information

Hex color code: #151B37

A dramatic blue shade, #151B37 appears as (21, 27, 55) in RGB and (229°, 45%, 15%) in HSL. It is typically applied in digital products.

Try:

Color NameDark Slate Gray

HEX

#151B37

RGB

21, 27, 55

HSL

229°, 45%, 15%

CMYK

62%, 51%, 0%, 78%

Shades

CSS Usage

color: #151B37;
background-color: #151B37;
border-color: #151B37;
box-shadow: 0 0 10px #151B37;
border: 2px solid #151B37;

Tailwind Usage

bg-[#151B37]
text-[#151B37]
border-[#151B37]
shadow-[0_0_10px_151B37]

Generate Gradient

→

Gradient CSS

background: linear-gradient(90deg, #151B37, #FF5733);

Preview in UI

Button

.btn-primary { background-color: #151B37; color: #FFFFFF; }

Badge

New Feature

.badge { background-color: #151B37; 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 #151B37; background-color: #151B3715; }

Alert / Toast

This is an alert using your color as accent.

.alert { background-color: #151B3720; border-left: 4px solid #151B37; }

Link / Accent

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

a { color: #151B37; }

Related Colors

Complementary

Analogous

Triadic

Split Complementary

Tetradic

Monochromatic

Popular Colors

Common HEX Colors

Color Theory

Relationships based on the position of #151B37 in the color wheel.

● Current● Complementary● Triadic● Analogous

RGB, HSL and CMYK Values

RGB

21, 27, 55

Red: 21 / Green: 27 / Blue: 55

HSL

229°, 45%, 15%

Hue: 229° / Saturation: 45% / Lightness: 15%

CMYK

62%, 51%, 0%, 78%

Cyan: 62% / Magenta: 51% / Yellow: 0% / Key: 78%

What color is #151B37?

#151B37 is a very dark shade associated with sophistication and elegance.

Color Shades

Complementary Colors

373115

Color Palette

HEX to RGB

Convert #151B37 to RGB:

rgb(21, 27, 55)HEX to RGB Converter →

HEX to HSL

Convert #151B37 to HSL:

hsl(229, 45%, 15%)RGB to HSL Converter →

HEX to CMYK

Convert #151B37 to CMYK:

cmyk(62%, 51%, 0%, 78%)Color Converter →

Color Meaning and Usage

A rich blue tone, #151B37 has RGB (21, 27, 55) and HSL (229°, 45%, 15%). Known for evoking sophistication and elegance, this very dark shade is a solid option for clean and minimal interfaces. Lighter variations like #FFFFFF create softer gradients.

The complementary color of #151B37 is #373115, creating high-contrast pairings. For softer combinations, try analogous colors like #152D37.

Use #151B37 in CSS: color: #151B37 or background-color: #151B37. Create palettes with Color Palette Generator or check contrast with Contrast Checker.

Contrast with #151B37

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

Contrast Ratio: 1.24:1

WCAG AA: Fail

WCAG AAA: Fail

Need more control? Contrast Checker →

Frequently Asked Questions

What color is #151B37?

#151B37 is a rich blue color - a very dark shade that evokes sophistication and elegance.

What is the RGB value of #151B37?

#151B37 in RGB is (21, 27, 55) - 21 red, 27 green, and 55 blue.

How to use #151B37 in CSS?

Use #151B37 directly in your CSS properties like color or background-color.

What colors go well with #151B37?

#373115 (complementary), #152D37 (analogous), and #000000 (lighter shade) work well with #151B37.