This is the 617th most frequent Slovenian word.
kakšne
"What kind of"
Here, 'kakšne' is an interrogative adjective modifying 'barve', asking specifically about the type of the attribute (color) of the flowers.
Kakšne barve so te rože?
What color are these flowers?
In this sentence, 'kakšne' functions as an indefinite adjective denoting some undefined or unspecified books.
Imam kakšne knjige, ki bi te zanimale.
I have some books that might interest you.
Here, 'kakšne' shows specificity and functions as an interrogative adjective used in an indirect question.