In this article from the New Orleans Times Picayune, the New Orleans Saints almost had a different color scheme than their familiar gold and black upon their founding in the late 1960's. Apparently an original owner, John W. Mecom Jr., had a fondness for a color other than those we now associate with the Saints. It looks like his companies all used a color of blue that was somewhere between royal and carolina blue. The NFL thought the colors looked too close to other NFL teams, particularly the San Diego Chargers and the Saints ended up adopting their familiar black and gold colors.
What if the NFL had allowed the Saints to adopt the colors of light blue and gold? What would the team's uniforms look like now? The team would certainly have a much different look and feel. The Saints' black and gold color scheme is one of the best and most forceful among all NFL teams. If the Saints had chosen blue instead of black, you can see from the image on the left that their image would be drastically different.
How about the Saints classic helmet? How would the use of blue instead of black impact the team's great helmet design? There could have been two ways the team may have used blue on the helmets. One direction would follow the helmet of today and sub-out blue where the black is now. The team may have also chosen a helmet that was predominantly blue with gold accents.
Ultimately I am very glad that the Saints chose gold and black as their primary colors. The result of blue replacing black would not have created the same classic look, but it is fun to take a look at "What If?".