King George III ruled New York when St. Paul’s Chapel was built in Lower Manhattan.

The chapel endured the Revolution, played a central role at the birth of the American republic in 1789, survived the terrorist attack on the World Trade Center 212 years later and then served as sanctuary, clinic and canteen for rescue and recovery workers in the mountainous wreckage across Church Street.

Its history will always be colorful. But the chapel itself will soon be much less so.

By the time the current renovation is finished — for St. Paul’s 250th anniversary on Oct. 30 — the pink and blue sanctuary, which looks like a candied Colonial confection, will have been muted to a creamier tone.

Next year, St. Paul’s will swap out its 1964 Schlicker organ for a 1989 Noack organ from the Church of the Redeemer in Chestnut Hill, Mass. The new (used) organ will be housed — as the Schlicker has been — behind an elegant mahogany case that dates to the early 19th century.

“It will fit perfectly here,” said the Rev. Phillip A. Jackson, the vicar of Trinity Church at Broadway and Wall Street. Trinity Parish, an Episcopal body, includes St. Paul’s, at Broadway and Fulton Street.