How do I change the theme Color?

You can always change the theme color by editing the core CSS file, but it's not a good idea to edit the core files because, if you update, your changes will lose. 

HostBilling supports custom plugins to override default styles. By using custom plugins, you will not lose your changes when you update the application.

We have created a sample plugin for this. 

Download the following plugin-

https://www.stackpiecdn.com/cloudonex/media/branding.zip

Rename style.sample.css to style.css and edit this file. You will find default colors in that file.

Now upload this plugin in the apps directory and click on the "Install" by visiting "Plugins" from the backend.