Cabinets and Trim for Mint and Chocolate Kitchen

I would paint the cabinets the chocolate brown color or a little darker and the trim the sand color to or the chocolate brown.

I would suggest a tint or tone of colors already used. Ceilings do not have to be white. I have a sky blue ceiling (Carolina Blue) and it works in the location. Also there are sparkles that can be added to spray paint for light. In a pale mint ceiling it would be light and different. Perhaps a darker version of one of your colors for the dining area ceiling would make it seem more cozy and more formal.

For the trim, I would go with a crisp white (assuming you're painting), as this will help highlight the other colors.