"The color is on the table."

Translation: Die Farbe ist auf dem Tisch.

[mukeshp]

Why I got wrong in this: I wrote "Die Farbe ist am Tisch", Please help, Thanks in advance :)

[joshmaks]

Duolingo needs to fix this. In southern Germany and Austria, "am" can also mean "auf dem" or "an dem".

[annag]

What is the difference between "auf dem" and "an dem"?

[joshmaks]

Both can mean "on the".

[annag]

Do they differ in usage, either connotation or denotation, or in context in which each is used, or are they basically interchangeable synonyms?

[joshmaks]

Interchangeable, varies by region.