They had put on colourful robes. (They were wearing colourful robes.)
Мо дар Соли нав арчаамонро бо бозичаҳои рангин оро додем.
For New Years we decorated our tree with colourful toys.
In Tajik they usually use the word бозичаҳо (toys) for tree ornaments.
Adding the suffix ин changes a noun into an adjective. Another example of this is сангин.