Was Vegeta's design altered mid series? When we first see Vegeta, while he is in space headed to Earth and on the Bug Planet he looks like this



But when he gets to earth he undertakes a sudden colour change to this



Now at first since Vegeta is initially off world i though that maybe it might have been the local suns had a different colour light to Earth's, but then that wouldn't explain why his scouter would remain the same colour.

I am wondering, is Vegeta's colour change a result of his design changing mid series? or is there a reason why everything but his scouter changes colour when he arrives on Earth?
From what I can find, there was no official explanation given for the color change. A couple of fan theories, including this one, are basically that the coloring was done before the mangaka announced the actual hair color, and that they fixed it once the color was announced. This is corroborated by the Wikia trivia for the episode, which states:


  This episode marks the debut appearance of Vegeta and Nappa in the anime. They are shown in colors quite different from their later ones, especially Vegeta. This is because Toei guessed their colors, as the corresponding Manga volume was not in color. Vegeta's case is corrected in the Dragon Ball Kai version of this episode and in the Dragon Ball Full Color Manga version as well. Nappa's was not, though it is possible he owns more than one suit of Battle Armor.


In-universe, his hair didn't change color, as he stated


  that a pure-blooded Saiyan's hair does not change from the day they are born, aside from Super Saiyan transformations (Wikia)