Transparency color in cells

I can understand that matching different monitor colors is a challenge, but the reply that indicates that changing the transparency of cell fill colors in Excel is not useful is just not helpful. When I want to highlight a cell in a spreadsheet, I like to use red as a strong flag that something needs to be done. When I fill the cell with red, the fill is so dark that it becomes hard to read. I would really like to have a red fill color that was more transparent so that the text could be read easily. The fact that there is such limited control over the transparency of fill colors in the current version of Excel is sad. More than 5000 people have looked at this question, so it is clearly something that would be useful. Microsoft - please consider an option that allows darker cell fill colors, not shape fill colors, to be modified so text can be easier to read.