Jimmy Fallon got to the roots of Donald Trump’s latest hair mystery after the president’s blond locks last week appeared noticeably darker.

“That’s what happens when you hire the Reflecting Pool people to dye your hair,” Fallon cracked on Tuesday’s episode of “The Tonight Show.”

The comedian then aired an ad for a spoof hair dye, called “Just For Men: Touch Of Cray.”

The voiceover said: “After just one week of applying Touch of Cray, you’ll have new hair and start to rename states, flirt with your assistant, kidnap world leaders, invade Canada, slap your face on every coin, host a fistfight on your front lawn, and post AI videos of you dabbing with Abraham Lincoln.”

“Now it makes sense,” said Fallon.

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