MacBook Pro 15 inch (2017) having blue patches on screen
MacBook Pro TouchBar and Touch ID, macOS Mojave (10.14)
Greetings, shchye.
I see that there's a bit of a blue hue in certain areas on the screen of your MacBook Pro. I'm happy to help.
How to reset the System Management Controller (SMC) on your Mac -- Reset the System Management Controller. Follow the steps under "How to reset the SMC on Mac notebooks" for a nonremovable battery. Test the issue once you're back to the desktop.
Reset NVRAM or PRAM on your Mac -- If resetting the SMC didn't resolve the issue, reset the nonvolatile random-access memory (NVRAM) using the steps in this article.
Use safe mode to isolate issues with your Mac -- If the issue persists, restart your Mac in safe mode and test how it responds. Afterwards, reboot normally and log into your own user account. Remember this when booting in safe mode: Graphics performance limited in macOS Recovery, safe mode, or Guest User mode
Let me know how that goes, and take care!
MacBook Pro 15 inch (2017) having blue patches on screen