Go monochrome. Wall color should wrap. If the kitchen and living area are designed to function as one, there’s no need to create the illusion of a second room. One large, airy space is much more impressive than two clashing corners.
Sweat the small stuff. Does your coffee table match your cabinetry? When two rooms become one, details matter. If you’re renovating and want to tear down a wall, consider what’s involved in getting the two rooms in sync, as the cost of redecorating one or both rooms can greatly affect your budget.
Think function first. Open floor plans are very social. It’s wonderful to have a companion lounging on the sofa while you’re prepping dinner -- but it’s also unrealistic to assume that no food or drink will make it past the counter. Keeping the vibe casual (and the furniture stain-resistant) will help you make the most of your space’s unique functionality.