This is the 369th most frequent Serbian word.
црвеног
"Црвеног" means "red" (genitive or accusative singular masculine form).
The word 'црвеног' is used as an adjective describing 'аута' (car) in the genitive singular masculine form.
Имам лепог црвеног аута.
I have a beautiful red car.
The term 'црвеног' describes 'оковрата' (collar) in the genitive singular masculine form, indicating possession or relation.
Обукла је капут црвеног оковрата.
She wore a coat with a red collar.
The adjective 'црвеног' is modifying 'семафора' (traffic light) in the genitive singular masculine, setting the traffic light's color.