Hi Erik. I had the same problem with the same board. A user worked out a solution, which you can find in the forum under
“Colors inverted on CYB/ESP32 display”
The solution where user_setup.h is edited to uncomment the line to invert the colors is the one I am using and it works fine. See below.
Christian

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Best Answer
Ivan Tarozzi answered 2 months ago

Ok, confirmed another workaround:

uncomment

#define TFT_INVERSION_ON

in User_Setup.h

So you can build examples from the book without other modifications

Hello Christian, thank you for taking the time to help out.
Unfortunately, this is what I tried and it looked better but then the Gamma problem showed.
The display is seemingly ‘too bright’ and edges of graphic components look ragged/pixelated.

There are many variants of this board and I managed to get the most worse version 😉

In the User_Setup file there is a section to fix RGB colors.

// Try ONE option at a time to find the correct colour order for your display

//  #define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
//  #define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red

Try to uncomment one at a time to see if it fixes the issue.
Regards,
Sara

Thank you Sara, but sorry to say but that also did not help.  
SOLUTION: After many hours trying all options available and scanning Google, I ordered a new board following the URL’s provided in the LVGL Ebook.  I should have done that in the first place. 
 

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