you need to use VBA
based on your description i think this is what you want
hit Alt+F11 to open up the VBA window then on the left there should be a window with all of your open excel files, find yours and expand the microsioft excel objects if it's not already expanded
then double click on the sheet named ScoreCard
then in the code window that pops up there will be a pulldown menu that will say (general) change that to Worksheet and paste the code below
I chose random colors for the tabs you can change them by recording a macro and changing the colorindex = and tintandshade = to the values you chose
if the value is outside the tab color will be set to "none"
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