The postcard size photo had to be same like the passport one coz my admit card photo have a blue background and for this they are asking white one
Dear Aspirant,
Don't stress over this.
You can still give exam . They prefer pic with white background but it is not that they are going to reject it .
Moreover if there would have been any such problem with photograph or thumb print , a message will be dropped to make required correction. If you got any such message and still you did not correct then you are not eligible otherwise stop thinking about all this.
Go through the guidelines issued by CBSE in this regard and if required to change any information & the image uploaded , you can change when you will be allowed to do so after form filling process is over . So relax and focus on study and always try to be sincere because a slight mistake may put you in embarrassing situation any time .
And yes , most important , if you have got the admit card that means no one can stop you from giving exam for this small issue
Don't get carried away and terrorized by such thoughts. Focus on your preparation and give your best.
You can also check the given Links below for further details:
https://medicine.careers360.com/articles/neet-2020-photo-size-format-documents
All the very best
Hope it helps