The low contrast design of Aha looks great on a monitor, but projectors tend to wash out colors, and Aha's low contrast design gets difficult to work with. An optional higher contrast design would be great for those important meetings where the plan gets projected to a large audience.
There are many customization options within Aha! - particularly when it relates to colors across many of the visualizations. This could be leveraged within Notebooks to help the colors pop a bit more when projecting to a larger audience.
However, at this time, we are unlikely to make changes in this area based on our strategic initiatives and resources at hand. I hope you can understand.