CSS

Mechanism for adding style to web pages

CSS is a style sheet language used for describing the presentation of a document written in a markup language like HTML.

Configure whether double or single quotes should be used.

Let WebStorm warn you about unsupported CSS properties.

Use an intention to quickly extract a ruleset in your stylesheet file.

Find out how to get completion suggestions for libraries like Bootstrap.

Review the related docs right in WebStorm.

Converting from HEX to RGB and other formats can be done real quick with WebStorm.