We really need to see pictures of your choices and your kitchen to able to help :)

I think you have made good choices it is avery neutral palette so you might want to add a little color when you get to the accessories just to keep it interesting. Even just some fresh flowers to bring some life and you can play with the colors until you find ones you love

I hope so.. because i think i missed up mixing these colors all together (black, brown, grey)

Hi, Dee! Do not fear, you can always combine those tones and choose one to hone in on when it is all finished. Gray is a very popular color right now, so I think I would try to focus on that if you like it. Here are a few small accessories that you could get to see how you do like gray in the kitchen. Yellow is a great accent color to go with gray as well;

http://deciture.com/shop/decor/world-market/flower-chevron-kitchen-towel/

http://deciture.com/shop/decor/pier-1-imports/yellow-gray-floral-tea-towel/

Hope this helps!

It might be a good idea to visit local showrooms to see the color combinations. If you're in the area, come join us for breakfast at our showroom and check out our free kitchen session every 2nd Saturday of the month: http://leichtnewyork.com/how-much-will-your-kitchen-cost-class-registration

Best of luck! Feel free to write or call us if you have any questions.