OnClick dhxWindow Button CSS Value

I have changed the ‘primary’ BUTTON color for buttons in a dhxWindow using:

.dhx_button–color_primary { color: #2c2047; }

This works BUT once clicked, it leaves a different color (faded) around the text. I have not been able to find an :after in CSS for this. What css style will I need to change the onClick color? Thank you.

Could you please, clarify what buttons in a dhx.Window are you trying to customize or provide a complete demo/snippet, where the problem can be reconstructed?
https://snippet.dhtmlx.com/888fmn4p