I am not sure what is your question. May be you ask the difference between azzurro and blu. In English there is only one woed. In Italian we distinguish two colours: azzurro is the colour of the sky, of eyes, of the calm sea ; it is a light blu. Blu is the icon of the internet (e); to give you some samples, you can also find blu in the flag of Finland, as well as in other national flags (Icaeland, UK...). I suggest you to look for the flag of Fiji, because this has both colours - I think you can easily understand what is azzurro and what is blu.

我也想知道~可能azzurro是天蓝，blu就相当于英文的blue，但是我也不确定 ps其实你可以用英文提问题，这样被回答的几率应该会高点，毕竟不是所有意大利人都会中文的。。。

azzurro is a light blue/sky blue.