12 CFR 328.2: Official sign.

(a) Design. Except as otherwise provided in this section, the official sign referred to in this part shall be 7” by 3” in size, with black lettering and gold background, and has the following design:

(b) Symbol. The “symbol” of the Corporation, as used in this subpart, shall be that portion of the official sign consisting of “FDIC” and the two lines of smaller type above and below “FDIC.”

(c) Procuring signage. An insured depository institution may procure the official sign from the Corporation for official use at no charge. Information on obtaining the official sign is posted on the FDIC's internet website, https://www.fdic.gov. Alternatively, insured depository institutions may, at their expense, procure from commercial suppliers, signs that vary from the official sign in size, color, or material. Any insured depository institution which has promptly submitted a written request for an official sign to the Corporation shall not be deemed to have violated this subpart by failing to display the official sign, unless the insured depository institution fails to display the official sign after receipt thereof.

(d) Required changes in signage. The Corporation may require any insured depository institution, upon at least thirty (30) days' written notice, to change the wording or color of the official sign in a manner deemed necessary for the protection of depositors or others.