A computer-implemented method for displaying graphical representation of legends in a data visualization engine is provided. The computer-implemented method includes receiving input to configure a plurality of swatches of the legends of graphical charts, the input comprises at least one of a threshold number of swatches, an identification of graphical area for displaying the swatches, and a size or a data of the swatches for display in the graphical charts of the data visualization engine. The computer-implemented method further includes modifying the legend swatches, based on the received input. The computer-implemented method further includes generating a plurality of graphical charts of the data visualization engine for displaying the swatches, based on the modification, wherein the display is generated randomly, based on at least one user preference for displaying the swatches.