Your picture is not that accurate. There's an ocean of difference between whites from Rio de Janeiro and Minas Gerais and the ones in the North or Northeast, for example.
These two states (RJ, MG) received Portuguese (or Italians as well in the case of MG) until late 19th century (MG) or 1950 (RJ).
The Europeans who arrived centuries ago were mainly in Northeast and I doubt there are many colonial whites in Northeast above 90% European. It's possible in MG and RJ because in these states, especially MG, the biggest flow of immigration happened in the 18th century and it's not that far in time.

