Is it okay to use a different colour than the one in your previous logo?

No. The neon green is my color branding.

Thank you for your reply and providing the color codes. I'll be submitting design based on your color and theme soon :D

Sir it would be so helpful for me if you have a look at my designs and rate them good. Please have a look. Design ID's are: #28605034
#28605030
#28605025
#28605023
#28605018
#28605014
#28605011

I'll be submitting 5 more designs tomorrow.

Please have a look on design id DesId #28605821.

Sir, I hope you'll have a look at all of my 25 logo's. I put so much effort in these and I wish to have at least some good rating for this work :)
Looking forward to it Sir.