Mich. Comp. Laws § 168.563
The number of ballots to be printed for the use of the electors at any primary election in any election precinct shall be not less than 25% more than the total number of ballots cast therein at the corresponding primary election held 4 years previously. The ballot at any partisan primary election shall consist of 1 sheet of 70-pound white book paper, machine finished, or the equivalent. The elections commission may provide that 1 of the political party tickets shall be printed on each side thereof or that the party tickets shall appear on 1 side of the ballot only. If 3 or more parties are represented at a partisan primary, the ballots shall be arranged with a foldover extension or the election commission may provide that the parties shall appear on 1 side of the ballot only. If the ballots are printed on 1 side only the order of the parties on the ballot shall be the same as they will appear on the general election ballot. The parties shall be separated by a heavy black line. If ballots are printed on 2 sides or with a foldover extension the various party tickets shall be printed, as near as may be, in the manner herein before set forth and shall be rotated so that each party ticket will appear face up on alternate ballots. The election commission may provide for the printing of the ballots on colored paper as follows: State and county ballots, white paper; nonpartisan ballots, blue tinted paper; constitutional amendments and state propositions, red tinted paper; county propositions, green tinted paper; local propositions, buff paper; local candidates, white paper. If the election commission prints ballots on colored paper, all instruction ballots shall be printed on any color paper not used for official ballots.
MCL 168.563