bash script function should have a magenta color shows blue

Question

bash script sample attached below, for the option "--cwp" in the function "mri-glmfit-sim", it should have a magenta color instead of blue, so how do I modify the script accordingly？

#!/bin/tcsh

setenv study $argv[1]

foreach meas (thickness area)
  foreach hemi (lh rh)
    foreach dir ({$hemi}.{$meas}-rate.{$study}.glmdir)
     mri_glmfit-sim \
      --glmdir {$dir} \
      --perm 1000 1.3 abs \ 
      --cwp 0.05 \      # should in magenta color as other --options but shows blue
      --2spaces
    end
  end
end