Fluent ribbon tab color

Question

Hello I am making an Edit tab in fluent ribbon that I would like the color to be different when it shows up. I currently have it showing and disappearing like it is supposed to. However, I cannot seem to have it show the correct color while it isn't selected, but when I select the tab it then is the correct color. Below are screen shots.

<fluentRibbon:RibbonTabItem Header="Edit" 
                      Visibility="{Binding IsInEditMode,
                                  Converter={StaticResource booleanToVisibilityConverter}}"
                      Background="Magenta"
                      BorderBrush="Magenta"
                      ActiveTabBackground="Magenta">
</fluentRibbon:RibbonTabItem>

Not Showing Tab Items:

Showing Tab item without color:

selected and the Showing correct color:

Answer 1

It seems to me, like your Background property would be commented out.
For FluentRibbon version 10.0.4, looks like Background overrides ActiveTabBackground then have no impact on UI. Also, i tested this behavior with Showcase Ribbon project and result was the same.

I did not found solution for single RibbonTabItem but if you will wrap item in RibbonContextualTabGroup, you will be able to set selected and not selected color for Tab:

<Fluent:RibbonContextualTabGroup x:Name="tabGroup1" Header="FIRST" Background="MediumPurple"/>
<Fluent:RibbonTabItem Header="KeyTips"
                ActiveTabBackground="ForestGreen"
                BorderBrush="Aqua"
                Group="{Binding ElementName=tabGroup1, Mode=OneWay}"
                </Fluent:RibbonTabItem>