Sets the background color.
gauge.setBackgroundColor(r, g, b);
uint8_t
): the color expressed in RGB form#include <Arduino_MKRIoTCarrier.h>
#include <Arduino_OplaUI.h>
MKRIoTCarrier carrier;
OplaGauge1 gauge1;
void setup() {
carrier.begin();
gauge1.begin(carrier.display);
gauge1.setBackgroundColor(0, 0, 0);
}