Not at all. 

I do look to see if they are high or low brass.  I had a couple of buddies who re-loaded shot shells and I thought I might so I asked what they looked for in hulls, but never even saved any hulls.

I do use color sometimes to differentiate between loading when everything is mixed up/not in boxes.  A buddy and I were given a  trash bag of shot shells that the boxes had gotten damp and melted.  Some was still in boxes identifiable, some in boxes that were unreadable, but most were just loose.  Slugs were easy to identify, brand and loading not so much.  Buck was mostly identifiable, some did end up in the mystery bag.  Half of  the bird shot was just mystery.  Brand and size of shot you could mostly id but no clue on loading.  I think I ended up with three or four gallon ziplock bags of mystery shot shells.  When I went to burn them up I would separate by color and brass size just to make busting clays a bit easier. 

Not at all. 

I do look to see if they are high or low brass. 

I do use color sometimes to differentiate between loading when everything is mixed up/not in boxes. 

I expect most shotgunners still look to "brass" height to indicate heavier shot loads.  I also suspect, many consider high brass loads as having higher velocity.

I recall hearing comments on how Federal buckshot loads were "no good" or "loaded light" because the brass was shorter than Winchester and Remington high brass loads.

In 1960 Federal was the first to use different hull colors indicate gauge.  Red for 12 gauge, purple for 16 gauge and yellow for 20 gauge.  The rest of the industry followed, at least with "safety yellow for 20 gauge shells.  Today, shotshells, primarily 12 gauge, come in a variety of colors from clear to black.

Even shotshell procurement by law enforcement agencies seem to be influenced by long standing tradition.  Just take a look at these Winchester low recoil rifled slug loads - both are 1 ounce, 1200 fps loads.  The tan box, white hull, low brass version was the first to market.  Apparently, these did not "look" powerful enough for agencies or the Winchester marketing department.

Indeed so!   

A bit closer to home...

Some years back, I decided to use my old Remington 1100 on a dog drive deer hunt.  I wanted to "field test" a buckshot handload set up with .30" pellets in a choke friendly 16x2 stack pattern. These were put up in 2.75" roll crimped Cheddite white low brass hulls. Designed for the 1100 with its 2.75" chamber, this was a 1.5 ounce, 1250 fps load.  A full power load.

While waiting for the first drive to get organized, another hunter noticed the white hulls in my six shell leather belt slide and asked what kind of shells these were. I pulled out one shell, marked only 1B on the over shot card. As he looked at the shell, I started to explained that it was a handload.  He just handed it back and said, "Low brass shells ain't no good for Deer."
                                                               

No luck on that hunt - unfortunately.

However, it would have been funny if I also had one of my 2.25" 12 x .30" pellet 1040 fps loads along that day.  I had assembled some of these on cut down cases with 22mm brass, almost half the loaded round length.  Compared to the 8mm brass my 2.75" roll crimped (same length as a loaded 3" fold crimp round), that would have been a hoot!

"Do ya think I oughta to use these high brass shells instead?"

Can you say "cognitive dissonance."     

buck and slugs are always different color. usually green and red. I run winchester super X hollowpoint slugs and remington express magnum 15 pellet 00 buck.

If you had chosen Winchester buckshot and Winchester slug rounds, as marketed to the general public, both would be red as would Federal.  Choosing the same from Remington, both would be green.

On the other hand, for the law enforcement market Winchester would  now have red buckshot and dark gray slug rounds.  Remington LE 12ga buckshot would be green and slug rounds would be blue. Federal LE 12 Ga are red for buckshot and blue for slug.

Oh yeah, nearly forgot to mention the above Remington and Winchester rounds would have higher brass than Federal.

Interesting.   

this is all moot now. I've gotten into reloading and landed a a few military shotshell hulls.
about 65,000 hulls specifically.
so everything is OD green with black steel 16mm heads.