The idea that the color red is the primary cause for people being killed is a false assumption. Actually it is the occupation those people have that is the primary reason for their job not being safe.
The EDIT ( the Earth Directorate for Intelligence Transformative analytics ), a brilliant board of real scientists, discovers this by replacing the color red with pink on certain away missions thereby showing that the danger of death migrates with that color.
The CAST thereby replaces it´sits scientists with real scientists from the EDIT and efforts are being made for ensuring the poor Redshirts survival.