Some aspects of the timeline view are altered per item and some in the container used as the view source.
Item (note) level:
Container (view) level:
Adornments: these use map view colour, border, etc., but smart (query) elements of adornments are ignored. Where they overlap, adornments follow map view stacking order, though this can still be adjusted in timeline view using the same controls as for map view.
Overall background colour is the container's $MapBackgroundColor, and thus is common to the container view across all major view types. The optional alternate colouring & pattern settings used for maps are ignored in timeline view.
Any aliases in scope, i.e. descended from the container (unless aliases and/or descendant display is disabled), are drawn like normal notes except that an italic font is used for the title. The note $Name/$DisplayName is drawn in $Color and the marker in $AccentColor with the marker line to the scale using a tint of $AccentColor. Timeline view uses display expressions for items but does not show their subtitles or hover expressions.