I have changed the above functionality a little bit and able to get colorPicked value in .cs page.
The other thing now is .. i have converted the color clicked by user to RGB value say 125,25,100 ans saved it to database. Now i need to any of the thing below.
1) make the ColorPicker selected color to that color which is previously saved in database(125,25,100) i.e)colorPicker shd be in selected mode to color 125,25,100.
2)or use template column in grid and display that saved color in database. So that user can see that template and knows which color was previously there.