"Baca and Nemanich in December filed a federal lawsuit challenging a Colorado state law that requires presidential electors to vote for the winner of the popular vote, saying that the founders intended for electors to be able to vote their conscience."

The first and second part of that quote are two entirely different things.  "Colorado state law that requires presidential electors to vote for the winner of the popular vote".  That's pretty cut and dry...  "saying that the founders intended for electors to be able to vote their conscience."  That has absolutely nothing to do with voting for your states' winner of the popular vote.

Colorado has 9 Electoral College votes.  It also has a population of ~5,541,000.  That means each Electoral College vote represents about 615,666 votes.  Why should these two people be able to completely nullify ~1,231,333 votes because they are trying to change the outcome of someone they didn't have to cast their votes for anyways?