In some examples, an electronic device includes a display panel comprising a plurality of pixels; and a controller to, for achieving power saving at the electronic device, select a theme from a plurality of themes that specify respective different display characteristics of displayed content, the different display characteristics including different colors, and based on the selected theme, change a display characteristic of the displayed content, the changing of the display characteristic including changing a color displayed by a portion of the plurality of pixels from a first color to a second, different color.