SharePoint 2016 Ribbon Custom Theme

Question

Is there a way to change the colour of the top black default ribbon of SharePoint?

Answer 1

It changes with the theme under site setting "Look and Feel" settings. If you want to change only banner you write css in the master page or common css file.

.o365cs-base.o365cs-topnavBGColor-2,
.o365cs-base .o365cs-topnavLinkBackground-2 {
    background-color: grey;
}

Answer 2

I found a very useful tool for this purpose. It's called SharePoint Color Palette Tool. If someone wants to make custom theme for the ribbon I suggest to use this tool. It's easy and fast.