Typo in operationtable

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The following code:

 from sage.matrix.operation_table import OperationTable
    OTa = OperationTable(SymmetricGroup(3), operation=operator.mul)       # optional - sage.plot, sage.groups
    OTa.color_table()

produces a table where the colors for the elements are wrong: f is purple in the first line but green in the second. It is confusing how can I change this?