As per the norms its well mentioned that your signature must be on a white page with black ball point pen. As you have done it with blue ink then you are not abiding the rules. Now as you have not followed the rules then there can be a chance of rejection. Although if there are information update options laterwards then you can change but its all dependent on the authority. I would recommend you to get it discussed with the officials of the concerning authority so that if there are some provisions they may guide you out.

I hope this answer helps. All the very best for your future endeavors!