Gov. Cuomo on Wednesday refused to discuss the $250,000 worth of blue-colored lane dividers he ordered installed in two East River tunnels — in apparent violation of federal safety regulations.

Asked about the vanity boondoggle during an unrelated Manhattan news conference, Cuomo at first claimed he “missed the thrust of that question,” then said, “All right, I would refer you to the MTA for that question.”

But he also made clear that he knew all about the problem, adding: “The delineators are not my area of proficiency.”

Hours earlier, The Post exclusively revealed that Cuomo replaced about 3,500 orange pylons with blue ones — to coordinate with the state’s official colors — inside the Brooklyn-Battery and Queens Midtown tunnels during recent reconstruction projects.

The Federal Highway Administration says the change violated safety regulations governing the color of “tubular markers,” which must be either completely or “predominantly” orange, or “the same color as the pavement marking that they supplement.”

The MTA claims the plastic posts in the tunnels aren’t covered by that rule because they’re “lane delineators,” and not “channelizing devices.”