Learn words for colours
The colours are normally used as adjectives, therefore the declination is the same as for adjectives.
ROZA (pink) stays the same in all cases and all genders.
Correct answer is The tree is green.
Alternative translations can be:
Correct answer is A banana is yellow.
Correct answer is I have a violet shirt.
Correct answer is I drink green tea.
Correct answer is Blueberry is purple