Electronic device with improved visibility of user interface

An electronic device and method are disclosed herein. The electronic device includes a display, and a processor. The processor implements the method, including: acquiring a background image of a screen generated for display, a region of interest (ROI) where a user interface (UI) element is to be displayed, calculating a value indicating a shape complexity of the ROI, dividing the ROI into a plurality of clusters according to designated attributes, calculating difference values indicating a contrast between each of the plurality of clusters and the UI element, identifying a minimum difference value from among the difference values as a contrast difference value, calculating a result value indicating a degree of visibility of the UI element relative to the background image, determining an image effect to be applied to the UI element, based on the result value, and display to the altered ROI the UI element.