In order to create the skin directory you need to create the structure of directories along with the corresponding CSS files as described in the section Structure Of Skin Directory. When this task is complete, you can proceed to editing the style properties.
In order to speed up and simplify the creation of the skin directory you can make use of an already existing skin (one of the default ones) installed on your server as a template for your own custom skin.
Create your future skin directory (e.g. my_skin):
# mkdir ~/my_skin
Copy to this directory one of the default skins:
The directory where all skins are located in Plesk is /usr/local/psa/admin/htdocs/skins/.
# cp -r /usr/local/psa/admin/htdocs/skins/winxp.blue/* ~/my_skin
At this point you will have in your skin directory (~/my_skin/) the complete skin directory structure along with the CSS and image files of the Plesk default skin winxp.blue.
The skin template is ready to be used. Now you can begin editing the CSS files and adding in the necessary image files within the skin directories creating your unique style of Plesk user interface appearance.
When using standard Plesk icons in your skin, you may notice white outlines on dark backgrounds.