But currently red is associated with the right to far right while blue is associated with the left.

In what context?

It didn't, red is used by leftists across the world. Blue is less common as a symbol on its own, but still used by right-wing parties.

The exception is the USA, where the use of colors to represent a party in graphics representing political divisions by area led to the association between red and the republican party, and blue with the democratic party in the 21st century.