Colors enrich life and this journal is where you can write your thoughts about them.
On the left side pages is a word or words intended to spark your thinking. On that page write all the things you can think of that are the color in the heading. On the right side page paste in clippings of things you find that are that color.
Do this in a haphazard manner or create mini-collages. Alternatively, using a good set of colored pencils do a sketch in the color designated in the heading. This will inspire you to see, differentiate and talk about the many variations of the colors of your world.