[wesk05]

4K w/ YCbCr 420 10-bit BT.2020 looks washed out and the colors are off. Guess the issue is BT.709 and BT.2020 color differences and not specifically the Shield?

If this is based on the home screen or playing BT.709 video, then yes. Shield doesn't really do a BT.709 to BT.2020 color space conversion. It simply sends the 8-bit value as 10-bit. ITU BT.2087-0 is the recommendation for this color space conversion.

**EDIT**
Upon further checking, it looks like Shield does do some sort of BT.709 to BT.2020 conversion. It isn't clear whether the conversion actually follows BT.2087 recommendation.