On September 6, 1938, Blue married Madeline McDowell, daughter of Angus and Madeline Stanford McDowell of Camden and Montgomery, Alabama. Blue and his wife Madeline had three children: John Angus McDowell Blue, Julia Tait Blue Weir and David Standford Blue.
In the early 1950s, Blue opened a Ben Franklinfive and dime variety store in Romney. Initially the store was located in a building owned by his father, John David Blue, which was later razed for the construction of the Pioneer Restaurant. Blue relocated the store between 1955 and 1956 to a three-story building that had previously housed Romney's theater. Following Blue's death, the Ben Franklin store was owned and operated by his wife, Madeline, until it ceased operation and closed in 1991.
Following the resignation of William L. Thompson from the WestVirginia House of Delegates on August 28, 1953, West Virginia Governor William C. Marland appointed Blue to fill Thompson's vacant delegate seat representing Hampshire County on September 23, 1953. Blue was nominated for re-election to his delegate seat by Hampshire County Democratic voters in August 1954, a primary election in which he received 729 votes compared to 536 votes for James W. Short and 517 votes for Harold L. Welker, both Democratic opponents from the Romney area. Blue subsequently ran in the general election on November 2, 1954 for his delegate seat and won, receiving 1859 votes compared to 1355 votes for his opponent, Republican candidate Earl A. Loy of Augusta. Blue filed for inclusion on the ballot in the Democratic Party primary election in 1958, but later lost in the primary to William Basil Slonaker of Dillons Run who went on to win Blue's delegate seat in the 1958 general election. Blue attempted recapturing his delegate seat in 1962, but was defeated in the Democratic Party primary election by incumbent Slonaker, 579 to 1430 votes. at the interment site of John Rinehart Blue and his wife Madeline McDowell Blue at Indian Mound Cemetery in Romney, West Virginia.
Blue died on May 27, 1965 of coronary thrombosis caused by coronary artery disease on his farm in Augusta. His funeral service were conducted by Rev. L. T. West at the Romney Presbyterian Church, and he was interred at Indian Mound Cemetery in Romney on May 29, 1965. Blue was survived by his wife, his three children, and his sisters Mrs. Bruce Whitfield and Mrs. Henry Hollenberg.
Affiliations
Blue was a member of the Romney Presbyterian Church affiliated with Presbyterian Church. He served on his church's board of deacons. In addition to his church, Blue was a member of the Moose Lodge, Lions Club, and Hampshire Post 91 of the American Legion.