Chart formatting resets when clearing slicer filters

[Hawk11ns]

There are several things happening here. First, I have 90 total series tied to vendors (30 days' data for each vendor). I manually colored each Vendors' series the same color so when I filter by day of the month, I will see a comparison of all three vendor's data. However, I am using slicers to perform the filtering on the table and when I reset the slicer (funnel/x button), all of the formatting I performed reverts back to the original. How can I make the formatting it stick?