So it is actually the onyx you are backlighting right. in which case the easiest would be to run LEDs under the counter in the cabinet just below the onyx.

Thank you Groveraxle for the virtual ! you are too good a designer that is why I cannot help troubling you ;) you have your biggest fan in me ever since your first advice:)) As for an in-house designer I am certainly going to call somebody soon . Just that I get such a lot of options and great advice from highly accomplished and talented Houzz designers ..I would be better prepared after these conversations ..please forgive me for pestering you guys like this:)

If you will like to go little different than Indian / traditional one, mint green colour is in trend and goes well with brick colour walls. Looks good if you have white appliances, crockery and some other elements that are visible with it. (Sourced from google images) https://goo.gl/images/Wyu1kR

@ Rupal shah thanks for your reply. Which other colors would you recommend other than grey and white? What do you think about something like aqua or teal colored laminate with this backsplash and black counter? I want the kitchen to look as fresh as it can.