Just stay on your direction, when everything are not make you feel better, maybe you should change your mood and make your true color still exist. There is lot of hobby, including coloring in pages, this is one topic, not only your kids love it, but at the same condition, you can have the same hobby too. Make one page full of color, maybe you should have prefer topic, what color is perfect for the picture.
Your kids always love action figure image, make a different color of their favorite choice and make a different character in the different page. You can also have your favorite image, such as a great view, the tallest building, or maybe just a test image, coloring in pages always make people have a lot of fun and feel enjoy with the new creation and a new color.
Something can be an important choice when you know much better about what is you choice is. In fact, coloring in pages is not only for your kids, but in the unique situation, you can have it as your hobby. Many of comic books are also made from the coloring process too, until the comic character become a heroic actor and can make other people believe about comic actor can be real.