Adding a new column or row in my datasheet is colored purple

When adding a new column or row in my datasheet the color is purple. I've already tried to clear formats, and deleted all conditional formatting and have made sure that all columns are formatted with white background and black text font. Additionally if I change views to gantt chart the entire section is also purple. The task bars are the default color per branding. I can't for the life of me understand how this happened. Does anyone know how to fix this?


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