Regulators shut down two Colorado banks this evening.

The Colorado Division of Banking closed Colorado Capital Bank in Castle Rock and Signature Bank in Windsor and appointed the Federal Deposit Insurance Corporation (FDIC) as receiver.

“Both banks are insolvent on a book basis and they were unsuccessful in their efforts to raise capital,” said state banking commissioner Fred Joseph.

The FDIC sold Colorado Capital to First-Citizens Bank & Trust Company of Raleigh, N.C., which earlier this year acquired United Western Bank.

It sold Signature Bank to Points West Community Bank out of Julesburg.

The seven branches of Colorado Capital Bank are scheduled to reopen Monday as branches of First-Citizens Bank & Trust Co. The bank has branches in Castle Rock, Boulder, Denver, Colorado Springs, Greenwood Village, Edwards and Parker.

The three branches of Signature Bank will also reopen as Points West Community Bank locations.

Depositors at both banks can access their money by writing checks or using ATM or debit cards this weekend, the FDIC said. Checks drawn on the banks will continue to be processed.

As of March 31, Colorado Capital Bank had approximately $717.5 million in total assets and $672.8 million in total deposits, the FDIC said.

Signature Bank had approximately $66.7 million in total assets and $64.5 million in total deposits.

Both banks had heavy concentrations of commercial real estate loans, Joseph said.

Delinquencies and defaults on those loans completely depleted capital, which forced their closure.

The FDIC will share losses on $580 million of Colorado Capital Bank’s assets with expected losses to the deposit insurance fund from the bank’s failure of $283.8 million.

Signature’s closing will cost the FDIC an estimated $22.3 million.

The FDIC is directing Colorado Capital customers with questions to call 1-800-508-8289 or to visit www.fdic.gov/bank/individual/failed/coloradocapital.html.

Signature Bank customers can call 1-800-517-1843 or visit www.fdic.gov/bank/individual/failed/signaturebank.html

The failures are the third and fourth in Colorado this year. Fifty-one banks have failed nationally so far this year.

Aldo Svaldi: 303-954-1410 or asvaldi@denverpost.com