The use of color and lighting in this movie is amazing. In 1969, most scenes are bright with a slight gold tinge/hue to them to show how happy John and his family were, but in 1999, at least until the end of the movie, everything is dark, tinged with blues and greys to show how miserable his future became with the death of his father followed by the death of his mother when his dad lived only to die of lung cancer later on. Then, finally, at the end of the movie after they've all Set Right What Once Went Wrong, everything is bright again to show the viewer that all is right in the Sullivans' world again and they've more than earned their happy ending.
In the pilot, Raimy's ham radio goes from having lost its cover to having a cover, just at the moment she needs to see a burn mark on the cover to realize she is not being trolled. It must be because 1996 Frank, knowing this needs to happen, has taken extra care not to lose that cover.
The missing cover is more obvious in an early version of the pilot, but it is still a problem in the released version. The bright glow that attracts Raimy to the garage would not be visible if the cover were on. (The cover is present for the second call but not for the first, allowing the possibility that Raimy found the cover in the garage and replaced it herself. However, this seems unlikely given that she believed the first call was from a "troll" and she wasn't happy about the radio being fixed in the first place.)