Blue is the most popular colour. Dark blue liners make the pool look deeper and will hide stains and imperfections more effectively than a lighter coloured liner, although dark blue is more susceptible to fading. Mid-blue liners give the water that traditional backyard pool look—bright and eye-catching. Light-blue liners make the pool water sparkle and will allow you to see the pool floor (keep the vacuum and scrub brush handy). A sandstone-coloured liner gives a tropical aqua colour—a look that is becoming more popular and is beautiful when paired with grey or terracotta-coloured coping and decking.