Color World
I could not verify a specific author named "Color World" from the available results. The closest matches appear to be a book titled "Color World" by Sanjay Ghosh and a separate "Colorworld Series" by Rachel E. Kelly, but neither supports a clear biography for an author named "Color World".
Sugar Skulls: Coloring Book For Adults,40 Fun & Quirky Art Activities Inspired by the Day of the Dead,Stress Relieving Skull Designs for Adults Relaxation
Sugar Skull Coloring Book: Coloring Book For Adults,40 Fun & Quirky Art Activities Inspired by the Day of the Dead,A Day of the Dead Coloring Book with Fun Skull Designs