There is an option to create a script that will run the instruction provided by @CorvusRuber . Then you will be able to activate colour blindness correction by right clicking on the script and choosing "Run in Konsole".
Create an empty file and open it with Kate.
Paste in the following.
#!/bin/bash
qdbus --literal org.kde.KWin /Effects org.kde.kwin.Effects.toggleEffect colorblindnesscorrection
Save the file.
Right click on it and select Properties
Go to the Permissions tab
Check the box next to "Allow executing as a program"
Job done, you can change your display easily now.
