An electronic device according to various embodiments comprises a display, a processor, and a memory, wherein when a theme of the electronic device is applied, the memory may store instructions that, when executed, control the processor to: on the basis of receiving a content display request, when content includes a first object stored with an individual custom color value, convert a color value of the individual custom color to a spatial value; and by comparing spatial distances between each color included in a standard color chart stored in the memory on the basis of the converted spatial value, standardize by a color value positioned at the smallest distance; and summon the first object of the individual custom color in the standardized color value to display same on the display.