[Solved] Unexpected text color in cells; can't change

[DWDun]

First time I ever encountered this and it has me treed.
For no reason that I can discern my entire sheet is now formatted as follows:
Keyboard-entered Text remains black, as it should.
Formula-derived Text, Dates and Numbers are now displayed in green.
Keyboard-entered Dates are displayed in blue.
These changes cannot be altered with the Text Color menu of colors, either individual cells or groups of highlighted cells, and I can find no method of formatting Spreadsheets as a whole. This color formatting does not carry over to the printer.
Appreciate any help.

[RoryOF]

Turn off /View /Value Highlighting.

[DWDun]

Will do, and THANK YOU very much!!