An electrolyte composition including a detectable contrast agent and an electrochemical cell including the electrolyte composition, wherein the contrast agent allows for detection of spillage or leakage of electrolyte during or after cell construction. In some embodiments, the contrast agent is able to change the color intensity of the electrolyte composition over time after addition to the cell. Methods for detecting spillage or leakage of the contrast agent-containing electrolyte composition during cell construction are disclosed.