Life is full of rainbow colors as sometimes it is very happy and full of brightness and bright colors like red ,, yellow etc but sometimes it is not very bright and we have to come out of that dark situation and then every thing will be better 
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LIFE IS FULL OF RAINBOW COLOUR. As we can see that rainbow has several colours (VIBGYOR ) life is also similar to rainbow is the mixture of all is also mixture of several emotions This means that we may have pain problems sadness happiness joy etc so we should withstand for all the emotions.