Lots of website help you to create QR codes these site are create black coloured QR codes only .if you want to create coloured QR code Unitag is a free web service that will help you to create coloured QR codes.No sign up and download is required for creating QR code. It is very simple and easy to use anybody.
To creat code simply go to Unitag website give data select you design and colour finally generate the code. Unitag provide Free and Premiume services. Premiume services add more features but it is very costly.