Congratulations on your new game room! Black and red are great colors to work with when building a color palette. The first step is choosing an object that inspires you, and that you can build the room around. This could be a piece of art or a piece of fabric, or even something as small as a pillow. Once you choose that object, build the color scheme using the hues in the object. If you choose the pool table as your inspiration, think of red and black in terms of an outfit. If you were wearing a red shirt with a black sweater, what other colors would you be wearing? Black pants? Jeans? Khakis? What accent pieces would you wear—a vibrant piece of turquoise jewelry? A gray belt? When you imagine the room as an outfit, it becomes easier for you to build a room that is your style, and in the level of formality that you are looking for. There are no concrete rules when outfitting your room—it all comes down to what you like and what works for you.