Starting with the bedroom suites...have your bedding selected. Choose a color that coordinates. You can accent the headboard walls with a darker color and carry that darker color into bathroom on the walls, or continue bedroom color and carry the accent color into your towels and shower curtain. I would paint kitchen and 2 dining room walls the same color, selecting a darker color for the drama in the dining room and contrast with your kitchen cupboards (such as your green color). The other walls in your living room, foyer and hallway, should be your neutral color such as a camel or warm gray. This neutral is bumping up against all of your other room colors. So, it will make a good transition from room to room. On the bold side, you could find a great wallpaper for the two walls in the dining room. Don't forget to play up your foyer with furniture for that first look impact. Selecting your bedding first, allows you to tweak your paint color and hue, and the darkness of your color. Enjoy.

If you could post pictures that would help, also make sure of your building's codes/rules, keep in mind weight, drainage, exposure (sun/wind/light), privacy concerns, lighting, etc. and consider getting professional design help for someone who specializes in roof gardens. You don't have to do everything all at once but a design professional could help you clarify your vision and give you ideas you may not have even thought to incorporate. Best of luck, 800 sf of outdoor space is wonderful. Don't forget you've got to get everything up to this space too.

just sharing the colors of the furniture the grey is going to be the body of the sofa and back cushions...the purple is the color of two small cushions which will be on the sofa.. what curtains do I think will go with these colors

It is better if you share the pics of the room and sofa. Colors are subjective choice but IMHO, Light blue and lemon yellow looks good with grey and black. Thanks, Nitin Cornerstone Designs, Bangalore.