1, first go to download their favorite topic: http: //www.phpstorm-themes.com/
But the download time will find a problem, after clicking to download and no download, but will open the file (different in different browsers) But if that happens, simply select all the contents inside, then paste it into a file suffix .icls (New notepad, then rename)
2, copy the file to C: \ Users \ Administrator \ .PhpStorm2018.3 \ the config \ colors file, and then restart the editor PHPstorm
3. Click on "File" -> "Settings ..." to open the configuration window; find "Editor" -> "Color & Fonts" Select theme file name you just added down in the Scheme box;
4. Personal recommendation microsoft visual 2013 theme