Abstract: A computer-implemented method for displaying spectral components of light to be, or being, emitted by one or more components of a display panel is disclosed. The method may comprise providing, to a user display of a user device, one or more representations of the spectral components of light to be, or being, emitted by the one or more components of the display panel. The method may also comprise receiving, from a user interface of the user device, one or more spectral parameter control values indicative of a variation of the spectral components of light to be, or being, emitted. The method may also comprise providing, to the user display, an updated representation of the spectral components of light to be, or being, emitted. The updated representation of the spectral components of light may be adjusted based on the one or more spectral parameter control values.