I really didn't know what these colours signified. Maciej and his mother always wore red and his father wore yellow. Even the bedclothes were differentiated in the parental home. Maciej's lover Dawid also wore yellow.
I also don't get the significance of the religious angle that banged on about the different religions of Mum and Dad. That a devout Roman Catholic would allow herself to get pregnant out of wedlock is pretty surprising anyway. If this was to highlight cultural and moral differences, it could have been done by having Dad as a freethinker. He seemed to be completely secular so I simply found the repeated references to his religion rather baffling.
For the first thirty minutes or so, I found the characters to be so crudely drawn, caricatures almost, that I was ready to give up. However, with the arrival of Dawid on the scene, more subtlety was the norm while their relationship developed.
As the film slowly moved along the road to tragedy, I became more emotionally involved. We learn in the very first scene of the film that Krystof, Maciej's lover has died and I cringed in parts for Dawid when Maciej made references to him that must have hurt. The two leads did a great job of their final parting and the ending, reverting to Mum, was a simply perfect one.
It's worth sticking with the film for what comes in the final hour of it. I'm glad I didn't switch it off.