TinyMCE Skin options
There are two options for applying a skin to TinyMCE: skin and skin_url. Tiny recommends using the skin option for skins bundled with the product or included in your cloud subscription. Custom or third-party skins should be included using the skin_url option to simplify updating and upgrading TinyMCE.
skin
This option allows you to specify the skin that TinyMCE should use, or false to not load a skin. The default skin included with TinyMCE is named "oxide".
Type: String or Boolean
Default value: 'oxide'
Possible values: the name of a skin or false
The name of the skin should match the name of the folder within the skins directory of TinyMCE. If the specified skin is not found, TinyMCE will not load.
tinymce.init({
selector: 'textarea', // change this value according to your HTML
skin: 'oxide'
});
If you would like to create your own skin, please see the guide here.