Four-byte \texttt{RGBA} data defining \texttt{boot.efi} user interface background colour.
Four-byte \texttt{\DIFdelbegin\DIFdel{RGBA}\DIFdelend\DIFaddbegin\DIFadd{BGRA}\DIFaddend} data defining \texttt{boot.efi} user interface background colour.
Standard colours include \textbf{BF BF BF 00}(Light Gray) and \textbf{00000000}
(Syrah Black). Other colours may be set at user's preference.