The Army's presidential color from 1912.  The first version of this flag was in 1898.  In 1901, the Army's flag was replaced by competing, older design from the Navy, but the Army kept their version of the color, which was the same design but with a gold and silver fringe, with a fancier flagpole, and used in ceremonies.  In 1912, two more states were added, which required two more stars be added to the Army's color.  Additionally, s:Executive Order 1556 and s:Executive Order 1637, which defined the dimensions for the 48-star U.S. flag, both specified that "The color of the field of the President's flag shall be blue" in an attempt to make the flag look closer to the Navy's version.  The Army thus switched their background color to blue, but changed the color of the star in the middle from blue to scarlet to keep the contrast.

This use of these flags continued until they were replaced by a new flag designed during President Wilson's term in 1916, in s:Executive Order 2390.  More information here.
Alteration of File:US Presidential Flag Army 1898.svg, with the location of the two extra stars taken from the version seen in Sea Flags.  en:File:Presidents Standard 1912.jpg shows them in a slightly different position, but I'm not sure which is right.  SVG Great Seal  taken from File:US-OfficeOfManagementAndBudget-Seal.svg, a U.S. Government work, and slightly altered and colorized to match version of actual flag (seen in File:Army Presidential Flag QMMuseum.jpg).
U.S. Government