Just in time for the first National Coloring Book Day on August 2, coloring for adults is not only acceptable -- it's trendy. Funnily enough, to those who spend most days "staying inside the lines ...

Professional artists on the pencils, markers and techniques that’ll take your adult-coloring obsession to the next level ...

Over a hundred museums and libraries around the world make coloring books based on their collections for the Color Our Collections program, led by the New York Academy of Medicine.