看个人喜好了! 如果你喜欢深色就用深色,
但注意一点 不要用太艳丽的颜色 因为比较容易视觉疲劳很容易厌.不耐看.给你些图片你参考下吧

银灰色的客厅装饰 电视背景墙效果图
http://www.maxsou.com/article/126/127/2007/20070308804.html
电视背景墙设计
http://www.maxsou.com/article/126/127/2007/200708201848.html
客厅电视背景墙
http://www.maxsou.com/article/126/127/2007/200708201849.html
客厅装修电视背景墙效果图精选
http://www.maxsou.com/article/126/127/2007/20070308909.html
又一些电视背景墙收集图片
http://www.maxsou.com/article/126/127/2007/20070308933.html
2007流行的电视背景墙
http://www.maxsou.com/article/126/127/2007/200706241778.html
客厅电视背景图片
http://www.maxsou.com/article/126/127/2007/200706241777.html
客厅电视背景墙设计
http://www.maxsou.com/article/147/150/2007/200706151769.html
家装客厅电视背景墙
http://www.maxsou.com/article/126/127/2007/200703311598.html