If I am not mistaken the blue colored streak came from one of the original line of toys. (Diaclone & Microchance) These were the toy lines the creators of the G1 Transformer cartoon were given to create the characters.
Bluestreak I think was a play on words to have a character who was blue and talked non stop. How the original G1 character became Sliver/Black/Red in the cartoon I have no idea.
IMHO I would say to be 'G1' accurate the blue colored streak would not be included.