Currently, when you load a different Kendo theme on the page, the colors in the Charts and Gauges do not change and the components remain styled based on the originally loaded theme. In order for them to be styled by the new theme, the page must be reloaded.
It would be best, if the page reload can be avoided. For example, a method similar to the existing redraw() method could be implemented and it should be capable of detecting the currently loaded theme and redrawing the components accordingly.