Function: Updates theme modification value for the active theme.

Function: Removes theme modification name from active theme list.

Function: Removes theme modifications option for the active theme.

Function: Retrieves the custom header text color in 3- or 6-digit hexadecimal form.

Function: Displays the custom header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).

Function: Whether to display the header text.

Function: Checks whether a header image is set or not.

Function: Retrieves template directory path for the active theme.

Function: Retrieves template directory URI for the active theme.

Function: Retrieves theme roots.