I don't remember who from AH.com members say it, but:
Blue is for aristocracy Republicans, Red is for Commie Democrats.
Here is my maps with results:
1912
William H.Taft/Nicholas M.Butler(R) 50.6%, 340 EV
Woodrow Wilson/Thomas Marshall(D) 41.8%,191 EV
Eugene V.Debs/Emil Seidel(S) 6% , 0 EV
1916
Charles E.Hughes/Warren G.Harding(R) 50.8 %, 466 EV
Thomas Marshall/James M.Cox(D) 49.2%, 65 EV
1920
James M.Cox/Franklin D.Roosevelt(D) 60.3%, 307 EV
Charles E.Hughes/Warren G.Harding(R) 39.7%, 224 EV
1924
James M.Cox/Franklin D.Roosevelt(D) 29.4% , 269 EV
Hiram Johnson/Robert M. LaFolette(R) 70.6% , 262 EV
1928
Herbert Hoover/Charles Curtis(R) 58.2% , 512 EV
Al Smith/Joseph Taylor Robinson(D) 41.8% , 19 EV
1932
Herbert Hoover/Charles Curtis(R) 42.6% ,318 EV
Al Smith/Albert Ritchie(D) 57.4% ,213 EV
1936
Franklin D.Roosevelt/John Nance Garner(D) 60.8% , 184 EV
Alf Landon/Frank Knox(R) 39.2% , 347 EV
1940
Franklin D.Roosevelt/John Nance Garner(D) 54.7% , 109 EV
Wendell Wilkie/Charles L.McNary(R) 45.3% , 422 EV
1944
Thomas Dewey/John W.Bricker(R) 46.6% , 436 EV
Harry Truman/Henry Wallace(D) 53.4% , 95 EV
1948
Thomas Dewey/John W.Bricker(R) 48.0% , 501 EV
Henry Wallace/Alben W.Barkley(D) 49.6% , 4 EV
Strom Thurmond/Fielding L.Wright(Dix) 2.4% , 26 EV
1952
Adlai Stevenson/John Sparkman(D) 55.7% , 113 EV
Dwight D.Eisenhower/Richard M.Nixon(R) 44.3% , 418 EV
1956
Adlai Stevenson/John Sparkman(D) 57.4% , 420 EV
Christian Herter/Harold Stassen(R) 42.6% , 111 EV
1960
Richard M.Nixon/Nelson Rockfeller(R) 50.3% , 509 EV
John F.Kennedy/Lyndon B.Johnson(D) 49.7% , 28 EV
1964
Richard M.Nixon/Nelson Rockefeller(R) 61.1% , 428 EV
Lyndon B.Johnson/Hubert H.Humphrey(D) 38.9% , 109 EV
1968
Ronald W.Reagan/George H.W.Bush(R) 43.8% , 469 EV
Lyndon B.Johnson/Edmund S.Muskie(D) 42.7% , 40 EV
George Wallace/Curtis LeMay(AIP) 13.5% , 28 EV
1972
Ronald W.Reagan/George H.W.Bush(R) 62.5% , 533 EV
Hubert H.Humphrey/George McGovern(D) 37.5% , 3 EV
John Hospers/Theodora Nathan(L) 0%, 1 EV
1976
Jimmy Carter/Walter Mondale(D) 50.1% , 426 EV
Nelson Rockfeller/Bob Dole(R) 49.9% , 111 EV
1980
Jimmy Carter/Walter Mondale(D) 57.3% , 270 EV
George H.W.Bush/John B.Anderson(R) 42.7% , 267 EV
1984
Walter Mondale/Geraldine Ferraro(D) 59.4% , 381 EV
Gerald Ford/Richard Schweiker(R) 40.6% , 156 EV
1988
George H.W.Bush/Dan Quayle(R) 54.3% , 512 EV
Walter Mondale/Geraldine Ferraro(D) 45.7% , 25 EV
1992
George H.W.Bush/Dan Quayle(R) 56.4% , 322 EV
Bill Clinton/Jerry Brown(D) 43.6% , 215 EV
1996
Bob Dole/Jack Kemp(R) 49.1% , 474 EV
Bob Casey/Al Gore(D) 50.9% , 63 EV
2000
Al Gore/Joe Lieberman(D) 48.4% , 458 EV
Bob Dole/Jack Kemp(R) 51.6% , 79 EV
2004
Al Gore/Joe Lieberman(D) 50.7% , 212 EV
John McCain/Lamar Alexander(R) 49.3% , 325 EV
2008
Joe Lieberman/Hillary Clinton(D) 45.7% , 267 EV
Ron Paul/Sarah Palin(R) 54.3% , 270 EV