Benedict's reagent is originally a blue-green or turquoise color. Used to test for the presence of reducing sugars, Benedict's reagent turns a yellow or orange color when heated in the presence of glucose or other reducing sugars, depending on the concentration of sugars.
Generally speaking, the warmer the color of the reagent reaction, the higher the concentration of reducing sugars in the solution being tested. If Benedict's reagent does not change color or turns yellowish-green, then there is little or no reducing sugar and the reaction is considered negative. If the solution turns yellow, it indicates a moderately positive reaction, and orange indicates a strong positive reaction.