Yes, surely. RadarCube ASP.NET contains a lot of properties intended to tune the color scale. These are the standard properties of the "Appearance" category, like Font, Color, and the properties of "Styles" category. You can read about it more in the "OLAP Grid visualization for an end user" article in the RadarCube documentation.
In addition, you can use the OnRenderCell event handler to set color, font, and the contents of the particular Grid cells. You can find an example of the event handler in the same article.