Paleta za boje - kvadrat - proziran
(Note: In Croatian, "prozorna" is the feminine form meaning "transparent." If you intended masculine/neuter or plural, adjust accordingly; the standard Croatian equivalent is "proziran" for masculine, "prozorno" for neuter, and "prozorna/prozorni/prozorno" depending on noun gender. Here I kept "proziran" to match Slovenian "prozorni" as an adjective form.)