This is the 1468th most frequent Catalan word.
vermell
Red.
Here, 'vermell' functions as an adjective, describing the color of the car.
El cotxe és de color vermell.
The car is red.
'Vermell' is used as an adjective representing the changing state of the sky during sunset.
Quan cau el sol, el cel es torna vermell.
When the sun sets, the sky turns red.
'Vermell' acts as an adjective specifying the color of one side of the screen.