Sorry, something came up whilst I was typing and I 'sent' in optimism.
I am new to Mac; I have a 4 year old Mini 4.1 OSX Mavericks v10.9.5 with Office 2011.
From the desktop, if I click on a blue folder in the Dock I get a smallish panel containing Documents that I have transferred from my pc. Also there is an 'Open in Finder' option. If I click on this I get an almost full screen showing all of my documents, palish blue folders on a white background and it is these two colours that I want to change.
If I right click on the white background, then 'Show view options', up comes a small tall panel with 'Background: White, Colour and Picture' together with a small square frame. The black dot is on 'White'.
Clicking on the frame produces a circular spectrum or colour wheel about 130mm on my screen. When clicking on it the same colour shows in the square frame. I now have the chosen colour in the frame and the selection dot (whatever) still against 'White'.
What do I do next to confirm or apply this colour?
Thanks in advance for your answers to this simple question.