Osric, I am colorblind as well so I put a lot of effort into making the game playable for myself. Here is what to do...
Oh and by the way, I like to have my enemy outlined in bright pink it seems to work better for me.
First Run the installer and choose 'Allied Silhouettes'
After the install is done. Open explorer and navigate to your res-mods folder as below...
Next you need to edit the rgb value for <enemyhighlight>
After you save the file and launch the game you should be good to go. Ask me anything else about colorblind and I will try to help.