Colour of windows????

As I was looking out of my room, I notice there is colour on windows.
Black common, blue/ green even brown... wow.. I just wan simple grille for my windows n my main gate.
Im considering not to have any window curtains cos so troublesome need to wash n redunct. May put up blinds instead if necessary.
Pondering where to install a shower screen?? mah? but area seemed to be too small Or just a curtain will do??? Afraid will smell / mold?