It would be helpful to have more control over the themes in Experience Builder. For example, the ability to fully customize button designs, picklist backgrounds (such as in the filter widget), etc. Further, there are accessibility concerns in application design when dealing with color-blind individuals in certain themes. For example, under certain theme conditions, a "hint" may be hard to see in contrast to popup windows due to a lack of full theme control. Beyond the current theme > customize > Advanced Color setting it would be nice to have these deeper controls for customization.