When I thought to make rainbow themed dinner for our anniversary , one among the dish I wanted to make was pasta as It is one of Nahids favourite, else he will be dissapointed if I didn't make something special for him .I searched for colored pasta at almost all supermarkets near us but could find only three colored ones green, yellow and orange that comes in a single packet. That too , colors are very light so once cooked I don't think it will be colorful as the way I want. So what's next?? Yesss Google !!!
I found the recipe to make colorful pasta from Tablespoon.com. It is very easy to make colored pasta if we have the food colors at home. Just cook the pastas , take ziplock bags according to the number of colors , add few drops of colour and water to each ziplock bag and divide the pastas into the ziplocks and shakeee...Voila!!! ... Colorful pasta is ready.
I used ready made pasta sauce for it's dressing . Added some veggies and chicken , Just heat up the sauce and  finally added the colorful cooked pasta and gave a mix to coat the dressing  over pasta well. You can add any vegetables you like or can make it plain just with pasta sauce alone. The addition of chicken and veggies gives the extra flavor  and also it is good to get those bites in between the pasta.The cream and butter gives a glaze to the dish, so if you are a calorie conscious person , omit them.
I have used liquid food colors to colour the pasta, you can also use gel food colors if you have them.