I searched in web there is lot of techniques to control the RGB LED. But this is the method which is very simple and easy.
In this method the color of LED is controlled by using the android application which is freeware you can download it from google play store.
Step 1: COMPONENTS NEED
1.HC-05 Bluetooth Module
Step 2: RGB LED
Step 3: CIRCUIT DIAGRAM & SCHEMATICS
RGB LED CONNECTION (Only pin 3,5,6,9,10,11 are PWM pins)
Pin 3 of arduino is connected to red pin of RGB LED.
Pin 5 is arduino connected to green pin of RGB LED.
Pin 6 of arduino is connected to blue pin of RGB LED.
HC-05 Bluetooth module connection
Pin vcc is connected to +5 or +3 based on your module.
Pin gnd is connected to arduino gnd pin.
Pin Txd is connected to arduino pin 11.
Pinn Rxd is connected to arduino pin 12.
Step 4: ANDROID APPLICATION
Download the color LED controller application from the google play store.
Click Here To Download
The application sends the information to HC-05 Bluetooth module then the module send the data to the arduino then then the color is varied by PWM pins in arduino.
Step 5: PROGRAMMING
The difference between the two program is.For common cathode the program sends positive value to PWM pins.
For common anode type