int RGB[]{3,5,6};
int Cores[8][3] = {
  {255, 0, 0},
  {0, 255, 0},
  {0, 0, 255},
  {0, 255, 255},
  {55, 125, 255},
  {75, 255, 125},
  {125, 125, 255},
  {255, 125, 255},
 };

void setup() {
  Serial.begin(9600);
  pinMode(RGB[0],OUTPUT);
  pinMode(RGB[1],OUTPUT);
  pinMode(RGB[2],OUTPUT);
}

void loop() {
  int ValorPot=analogRead(0);
  Serial.println(String(ValorPot));
  int Cor=map(ValorPot,0,1023,0,8);
   analogWrite(RGB[0],Cores[Cor][0]);
   analogWrite(RGB[1],Cores[Cor][1]);
   analogWrite(RGB[2],Cores[Cor][2]);
}