When one colors, all negative emotions should wear off. Once you empty your brain and heart of those negative feelings that make you stressed out, there should be more room for positivity. Since you are positive and filled with good energy after coloring, there must be no difficulty in continuing your job with full productivity.
Just like guided meditation, coloring allows us to switch off our brains from other thoughts and worries and focus only on the moment, helping to alleviate stress and anxiety. It can be particularly effective for people who aren't comfortable with more creatively expressive forms of art, like painting or writing. The participants who are more guarded find a lot of tranquility in coloring images. It feels safer for them and it creates containment around the coloring process.
Hello Kitty has even her own album, called "Hello World", featuring songs performed by many artists. Sanrio and Fender even released a line of Hello Kitty guitars and a jet airplane. We can say that along Pucca, another popular Japanese cartoon character, Hello Kitty is even more popular and more known that a lot of live artist or important people. It is a good example of globalization along with names like McDonalds, Coca-Cola and other like that.