Thank you both DaveLembke & boruto for your reply.
DaveLembke has the right answer here, I was trying to change some colours but just could not remember where I was at the time that I made the change to red. It was a test to see just exactly what, that area I was in did in fact change.
Late nights & alcohol had their effect so I went to bed & totally forgot what I'd done.
Of course Windows 10 was no help with their format of "we made windows 10 so much better" attitude & use this or find another way to do everything that we've been training you to do with a different O/S...... Enough of my rant about windows,,, The answer is as DaveLembke highlighted.
Many thanks Dave for bringing me back to earth.
Thanks also to buruto for your suggestion.
Wishing you all a Happy & joyous Christmas Holiday season. ImnoGuru