Orange is the new blue.

President Biden is making his case to voters that he has the strength and vitality to serve another four years as president — by trying to look more like his 2024 GOP rival, former President Trump.

Since his catastrophic — and painfully pale — debate performance two weeks ago, Biden, 81, has taken on Trump’s trademark copper hue, experts told The Post.

“It kind of gives him more of a sun-kissed, alive, terra-cotta Mediterranean, healthy look,” observed Irina Gottesman, founder of skincare line House of Gro.

“Everyone looks better with a little color.”

The famously copper-toned actor George Hamilton said he was also a fan of the new look. 

“Can’t we all lay out together and make America Tan Again?” he told The Post.

Biden’s naturally pale Hibernian hue was strikingly aglow in appearances almost immediately after the debate, including his sitdown with ABC News anchor George Stephanopoulos last week, which did nothing to silence mushrooming questions about his cognitive health. At a NATO press conference in Washington D.C. Thursday, a bronzed Biden referred to Ukrainian President Zelenskyy as “President Putin” and said he was running for re-election alongside “Vice President Trump.”

The White House did not respond to multiple requests for comment.

Biden also appears to be adopting a more Trump-like campaign strategy– by actually making public appearances instead of a redux of his 2020 “basement” campaign.

“They are doing everything they can to try and show that Biden is as strong and mentally aware as Donald Trump and every time they try they are failing,” said Erin Perrine, a veteran of Trump’s 2020 presidential campaign.

What to know about the calls for President Biden to drop out of the 2024 race:

• President Biden’s poor performance in the first 2024 presidential debate left some Democrats unsure of his fitness for office and future as the party’s candidate.
• More than a dozen congressional Democrats have joined in calling for Biden’s exit from the race. Former Biden supporter George Clooney echoed these calls in an op-ed published in the New York Times just weeks after he helped lead a record-breaking fundraiser for the Democrat.
• Democratic voters have continued to raise concerns about Biden’s nomination since the debate, with speculations and suggestions for replacement nominees running rampant.
• Biden’s former running mate Barack Obama has reportedly been trying to pressure him to drop out, and had prior knowledge of Clooney’s op-ed. Former House Speaker Nancy Pelosi allegedly told Biden he could not beat former President Donald Trump this time around.
• As the Democratic National Convention approaches, California delegates for the Democratic Party are reportedly in disarray as debate over the president’s chances of re-election threatens to tear the party apart.
• However, the Biden campaign has denied any plans for Biden to bow out and for Kamala Harris to step in as the Democratic nominee. Sources close to the president believe he might not be willing to drop out, while other sources claim he is “receptive” to giving up on a second term.

Biden continues to face growing calls from Democrats to leave the presidential race in favor of a younger candidate, with allies such as George Clooney turning his back on the president and saying it’s time to call it quits. Biden has remained defiant, arguing that he is the best candidate to take on Trump and that only “Lord Almighty” will drive him from the race.

“With any of these guys who don’t think I should run — run against me. Go ahead, announce for president. Challenge me at the convention,” Biden said Monday on MSNBC’s “Morning Joe.”