my son just notice his urine was dark brown after attending a birtthday party, he ate lots of colorinated foods e.g. ice cresm, cakes, etc., he has a common cold now which causes his slight fever, I'm just worried of the discolorinesation of his urine. I see no signs or symptoms from the topics I've read. I presume that he lacks liquid intake since he's not used to drinking water. Am I right with my idea? Please help...

There are quite a few reasons as to why the color of your urine changes. For example it can be due to inadequate fluid intake to a serious disease. However the main cause of dark colored urine is dehydration, which means you are not taking in enough water into your system. The dark urine color is from a high concentration of the waste materials rather than water. If you are dehydrated, you may even smell a stronger odor in your urine because of the nitrogenous waste products.