Colourative customisation within "Display > Styles and Wallpapers" is reduced.

LineageOS, and the Android Open Source Project, allow selection of alternative colour during thematic customisation. The interface that provides this ability, as demonstrates, exists, yet provides no ability to select alternative colouration.

Consequently, please explain why this ability has been removed, and please remediate it. Whatever rationale caused removal of it this ability is irrational, because this ability merely allows accentual colouration.