A site administrator who has access to the Moodle code can easily install a new theme Moodle theme. Once installed, the theme will be available via the appropriate site, category, course or activity menu.
In this example, we will change our site theme to a new one that we added. Your role will require the permissions to allow you to change themes. Remember that themes can be changed in many contexts in Moodle.
You may select different themes depending upon the device that will be viewing Moodle. For example, you might have one theme for computers with monitors and another for mobile phones and another for tablets.
Go to the Settings block
Open Settings > Site administration > Appearance > Themes > Theme Selector link Open the Appearance > Theme selector page
Click on "Clear theme caches" button Click the Clear theme caches button
Click on the "Select theme" button on the right of the current theme being used for the deviceFil:instheme09.pngClick the Clear theme caches button
Scroll down to find the theme you wish to use
Click the "Use theme" button next to that theme Click the Use theme button
Moodle will tell you it has been saved as the default theme Checking if the theme is the one selected
Check your Moodle site by going to the Moodle site's home page.
You may have to refresh your browser to see the new theme.