Color, Add Rule, Boolean Expression, ... contains

I am new to Spotfire. I tried to create a new color rule which will highlight all the rows or fields which contains for example "mich". My question is, what is the correct code to get this done. I tried various things, I tried [Axis.Color=mich] to do a test and it did not work., keept getting error. I also tried  [Axis.Color~='mich+'] and that did not work either. I keep getting error "invalid type for functional call '=' on line 1, charachter 13

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