Hello.

I found a problem with displaying colors for st7789. this problem is described here: https://forum.arduino.cc/t/problem-with-st7789v-displays-green-value-1-and-every-other-uneven-is-gray/700584/13

My solution was to add these lines in Panel_ST7789.hpp :

static constexpr uint8_t CMD_RAMCTRL = 0xB0;
CMD_RAMCTRL, 2, 0x00, 0xF0, //0xC0