A calculation pattern that is useful for measures in general but does not satisfy the specific context transition requirement here

Sales of both Red and Blue products, however, this wording confuses row context, filter context, or evaluation timing and therefore misses the exact DAX behavior being tested.

An error, although it sounds technically credible, it does not align with how DAX functions propagate context in this scenario.

Sales of Red products only (the CALCULATE filter overrides the visual filter for Color)

Zero, because the visual is filtered to Blue, although it sounds technically credible, it does not align with how DAX functions propagate context in this scenario.