int R=8,G=9,B=10;

// LED Common Cathode
void setup() {

  Serial.begin(9600);
  
  for(int i=8;i<11;i++){
    pinMode(i, OUTPUT);
    // Just for testing
    Serial.print("setting pin");
    Serial.println(i);
  }

}

void loop() {
  setColor(255, 255, 255); // White Color
  delay(300);
  setColor(0, 0, 255); // Blue Color
  delay(300);
}

void setColor(int red,int green, int blue){
  //Code correction for cathode
  red = abs(255-red);
  blue= abs(255-blue);
  green= abs(255-green);
  


  analogWrite(R, red);
  analogWrite(G,  green);
  analogWrite(B, blue);
}