Changing text colors

[mathman]

I have recently switched to the ribbon format and am having a few problems.
In an old spreadsheet, the text appears in various colors, I clicked cell on the upper left to select the entire sheet hoping to change all the cells, but can find nothing on the ribbon to change the colors, What is worse, there is no HELP button to activate the user manual or online help forum.
Can someone help?

[SuperTech]

You can change the text color of the cells from the ribbon command Home | Character | Font color.

Please check the screenshot below for your reference.