FAQ: How to solve preview issue (red/blue tint) with Canon C300 MKII MXF files in Premiere Pro 15.0?
Update: This issue is being addressed in our Beta releases and will be available in a future stable release. You may download the latest Beta build from the Creative Cloud Desktop app. Refer to this link to know more about Adobe Creative Cloud Beta.
We are investigating an issue with Premiere Pro v15.0 where the MXF files from Canon C300 Mark II show red/blue tint when previewed in the Source/Program monitor. The issue seems to be related to incorrect interpretation of channels. We are working on getting this issue sorted in a future release.

For the time being, you may try these steps to restore the correct preview.
- Apply Channel Mixer effect (Effects > Obsolete > Channel Mixer) to the MXF clips affected by this issue
- Highlight the clip & navigate to the Effect Controls panel
- Under Channel Mixer apply these values
Red-Red 0
Red-Blue 100
Blue-Red 100
Blue-Blue 0
This should restore the correct preview.

Note: Please remember to remove the Channel Mixer effect from the clips once the bug fix is released.
Hope this helps in solving the issue. Let us know if you have any questions.
Thanks,
Sumeet

