One of the things I like to do sometimes is to review my colors. These are my blues. I feel like I have a nice range from cools to warms and even some leaning toward green. I also have a range of light to dark. Some are staining some not. Some are opaque. I don't really use a lot of blue but I wanted to review and see if there might be any I would eliminate.
These little exercises are fun to do. They get you painting and it's always good to keep learning about the characteristics of each color because they all are very different.