I used lvgl library version 7.11.0, Arduino IDE 1.8.19, and Arduino Portenta H7. Simple program that displays a test label at the center of the screen. Shows how to recolor text using the format:"#(color hex code) text to change color# this text will not change color"
I used lvgl library version 8.3.6, Arduino IDE 1.8.19, and Arduino Portenta H7. Simple program that displays hello world on a magenta background (Hex: d956e7).
be sure to include "lv_task_handler();" in the loop or else you will get weird artifacts or no display output at all