Aspects of the disclosed subject matter are directed to customizing the colors of instruments that are used to convey vehicle readings. In accordance with one embodiment, a method is provided that obtains input to perform a color change to one or more instruments presented on a graphical display. For each instrument affected by the color change, a determination is made regarding whether a threshold level of contrast exists between a symbol graphic of the instrument and one or more background colors. If a threshold level of contrast does not exist, the contrast ratio between the symbol graphic and one or more background colors is adjusted to at least the threshold level. Then the method causes the graphical display to render the one or more instruments in accordance with the received color selections.