Hello Namish.

First of all, I assume that you have your UG in mechanical engineering (as you haven't mentioned your qualification), and answer your question accordingly.

As a color blind candidate, you will not be able to work in fields which involve some sort of color in dangerous places. Like Component designers, Pilot, defense, or technical drawing engineer, mechanical technician. These are the most common mechanical engineering fields. But all these involve color in crucial places. So, you cant join them.

Coming to govt jobs, color blind candidates are accepted in IAS, and some other civil service jobs. (not IPS). But as you are already 28, You have only one or 2 attempts for most of the govt civil service jobs. That too only if you have relaxation on age category based on your caste or region. So, its really hard to get in there.

Next and only other options are jobs as a mech Eng. in production industries, telecom company, DRDO, SAIL, IES, and some other Engineering fields.

But with confidence you can also start your own company and have workers under you. That would be great. Having a startup company is really good option for you.

So, I have mentioned some jobs that you could apply. You have to choose according to your interests.

I hope my answer helps.

Feel free to ask any doubts in comments.

Good Luck