Microsoft Dynamics CRM 2015 Update 1 introduced a very nice feature, “Themes” , which allows us to add colors to different below components in supported way. We can access theme by navigating Settings->Customizations-> Themes. There is one default read only, out of the box theme available in every CRM deployment. We can’t do any modification to this theme but we can make new custom theme or can make clone of existing default theme using Clone button available in command bar.
Once we are done, we can export and import it in our CRM application easily. Themes are not part of the solution so we can export and import them as excel file. So keep in mind to move theme, when you are moving your customization from dev environment to staging environments.