Questions & Answers about Jeg liker sølvfargen på sykkelen.
We’re talking about a specific color and a specific bike, so each noun is in the definite form. In Norwegian the definite article is a suffix:
• farge (a color) → fargen (the color)
• sykkel (a bicycle) → sykkelen (the bicycle)
på indicates that the color is “on” the surface of the bike.
• av would suggest “made of” (e.g. “laget av stål” = made of steel).
• i would be “in” something.
So fargen på sykkelen literally means “the color on the bike.”