By skyforbes 
It was not explicitly mentioned during the reveal but custom color shells for Steam Deck OLED were shown during the presentation.
Namely:
White-Gray – also shown from different angle at 2:04
Translucent/Smoked Black-Orange.
My bet Steam Deck 2 won't be annouced for a while since they are just starting to offer in new color variants this late in the product's lifecycle.