With conditional formatting for tables, you can specify customized cell background colors based on cell values, including using gradient colors. To access conditional formatting, in the Fields well of the Visualizations pane in Power BI Desktop, select the down-arrow beside the value in the Values well that you want to format (or right-click the field). You can only manage conditional formatting for fields in the Values area of the Fields well.
In the dialog that appears, you can configure the color, as well as the Minimum and Maximum values. If you select the Diverging box, you can configure an optional Center value as well.
When applied to a table, the customized formatting applied using the steps outlined above overrides any custom table styles applied to the conditionally formatted cells.
To remove conditional formatting from a visualization, just right-click the field again, and select Remove Conditional Formatting.