There were two best-known sets of unnamed redecos in two early episodes of the cartoon... a cartoon that was filled with many many many many different Seeker decos.
One trio of Seekers in the Gen1 cartoon was labelled at some time in the fandom as the "Welcoming Committee" Seekers of the first episode of Gen1, who were...
orange,
light purple, and
light blue (same colour as Thundercracker but more white on legs).
The other trio of Seekers in the Gen1 carton was labelled quite early on in the online fandom (as far back as I can remember in the mid-90s), as the Rainmakers in the episode "Divide and Conquer" who fired acid rain on the group of escaping Autobots. These three were...
bright green,
bright yellow, and
mid-blue (darker than Thundercracker).
Now, most assume that Sunstorm was part of the Rainmakers, because it has "storm" in the name, but the colouring has always been closer to the orange coloured Welcoming Committee Seeker. Since that one was named about 10 years ago for the Ehobby toy (and the colour scheme used by Dreamwave in their Gen1 comic)... fans since then are forgiven for mixing up the two trios when recognising Sunstorm as being in the first episode instead of the Rainmakers episode.
Then in 2013, FunPub released a 3-pack of Seeker jets that showed that even the people in charge of the names got confused. They had incorrectly labelled as Rainmakers (which they later agreed was meant to be the Welcoming Committee) probably because it had Sunstorm in their trio of toys.
So now that we have a Sunstorm toy that is officially a "Welcoming Committee" Seeker... is it also a "Rainmaker" Seeker (as in, is it now, or always was, the same Seeker that was the yellow one in the Rainmaker episode)?