If you have seen blue cardboard in a dream: Find new ideas and let go of your old habits, You should face the facts and express your thoughts in a polite language. To see a blue cardboard in a dream indicates that the person who sees the dream will have very good developments in his life, his work will be easier, his troubles will disappear, he will achieve his wishes, he will leave the hard and bad days behind and he will live in prosperity. It indicates that the owner of the dream will receive very good news, will be very happy and will be happy.