Missile crew uniforms in the Titan II weapons system only made one
drastic change in appearance.

The original crew uniform was a set of White Coveralls
with an ascot.  Each squadron had it's own color for their ascot.
The 571 SMS used Blue.
The 570 SMS used Gray.

At some point in the 20 plus year history of the Titan II weapon system,
the crew uniform was changed to the standard Blue Utility Uniform
or "Crew Blues".
The uniform consisted of a blue fatigue shirt and pants.
The ascot color remained the same.
There was also an optional unit baseball style cap as seen in this picture.
It was the matching color of the unit ascot as well as displayed
the Squadron number.