single led colour change

requirements.txt

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+pyserial

serial_send_LED.py

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+import serial.tools.list_ports
+
+ports = serial.tools.list_ports.comports()
+serialInst = serial.Serial()
+
+serialInst.baudrate = 9600
+serialInst.port = '/dev/cu.usbmodem1401'
+serialInst.open()
+
+while True: 
+    command = input("LED pink/red/green? invalid response will show blue bc why not: ")
+    serialInst.write(command.encode('utf-8'))
+
+    if command =='exit':
+        exit()

sketch.ino

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+  const int greenLEDPin = 9;
+  const int redLEDPin = 11;
+  const int blueLEDPin = 10;
+
+
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  pinMode(greenLEDPin, OUTPUT);
+  pinMode(redLEDPin, OUTPUT);
+  pinMode(blueLEDPin, OUTPUT);
+
+}
+
+void loop() {
+
+
+  if (Serial.available()>0){
+    String msg = Serial.readString();
+
+    if(msg == "pink"){
+       RGB_color(255, 255, 125); // Rasp 
+    } else if (msg == "red"){
+      RGB_color(255, 0, 0); // Red
+    } else if (msg == "green"){
+      RGB_color(0, 255, 0); //Green 
+    } else {
+      RGB_color(0, 0, 255);
+    }
+  }
+  // put your main code here, to run repeatedly:
+  // RGB_color(255, 0, 0); // Red
+  // delay(1000);
+  // RGB_color(0, 255, 0); // Green
+  // delay(1000);
+  // RGB_color(0, 0, 255); // Blue
+  // delay(1000);
+  // RGB_color(255, 255, 125); // Raspberry
+  // delay(1000);
+  // RGB_color(0, 255, 255); // Cyan
+  // delay(1000);
+  //RGB_color(255, 0, 255); // Magenta
+  // delay(1000);
+  // RGB_color(255, 255, 0); // Yellow
+  // delay(1000);
+  //RGB_color(255, 255, 255); // White
+  // delay(1000);
+}
+
+void RGB_color(int red_light_value, int green_light_value, int blue_light_value)
+ {
+  analogWrite(redLEDPin, red_light_value);
+  analogWrite(greenLEDPin, green_light_value);
+  analogWrite(blueLEDPin, blue_light_value);
+}
+