IQ Styling is only available with IQ widgets (hence it's called IQ styling): You however used the legacy Text widget in your HMI which is not an IQ widget and hence does not support IQ Styling: From the WebIQ Designer Manual: You are discouraged from using legacy widgets in new HMIs, they are only there for legacy purposes when loading very old HMIs. If they were not there, old HMIs would break.
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