Good morning.

My question is that i'm assigning material to the diferent parts of my object buf i can't change the color of a specific material. For example, the body of my object must be pink and made of plastic. There's any pink plastic, so i can't get what I want correctly. If i change the color in the menu on the left (once i have chosen any plastic), the object is pink but then when i run the render it turns to the original plastic color.

does anyone know how to solve it?

Thank you!