PhpStorm and WebStorm themes can be installed in two ways:

Dropping an XML file into the colors folder.

Dropping the ICLS file into the colors folder

Installing from an XML/ICLS file

<Product> corresponds to the product you are using, it could be WebIde, WebStorm1, Webstorm2016.1, etc.

OSX

On Finder, navigate to the location where you downloaded the XML/ICLS and copy it.

Then press shift+command+g and go to:

~/Library/Preferences/<Product>/colors/

Paste the .xml or .icls file in and restart your IDE. Then navigate to Settings > Editor > Colors & Fonts and select the color scheme you just added.

Windows

On Windows Explorer, select the XML/ICLS file just downloaded and copy it.

Then navigate to the colors folder, located in: C:/Users/USERNAME/.<Product>/config/colors Paste the .xml file in and restart your IDE.

Then navigate to File > Settings > Editor > Colors & Fonts and select the color scheme you just added.

Linux

On Linux, the color files are located in: ~/.<Product>/config/colors/ After you put your .xml files, restart your IDE.

Then navigate to File > Settings > Editor > Colors & Fonts and select the color scheme you just added.