Allow custom colours for highlighting active messages and folders - specifically as messages are dragged on top of folders
When a folder is selected in left column of Outlook, it gets a faint blue colour, as soon as that section of the screen stops being the active section (ie another column is selected or another window is selected or the program moves to the background) the faint blue colour switches to a faint grey colour. This faint shading is very difficult to see as it's very close in shade to the white background.
Additionally when an eMail message is dragged between folders, the new target folder gets the same faint grey colour, which is almost impossible to see under the grey border of the message being dragged.
There needs to be a way that we can customize the colours to something visible, or perhaps have the colour scheme updated to brighter / easier to see colours. Prior to the current update, the "highlighted" folders had a easy to see blue colour when draging messages on top of a folder.