The different colors help when you have four different classes to teach. Not quite as sturdy as the regular olive green ones but will work for my students needs.
I’ve been using these for years! I love all of the colors. They’re very well made and I’ve never had one come apart. Cheaper ones from other stores don’t last for me. I’m our family’s Genealogist. I use different colors for different branches of the family tree. I’m constantly taking pages out and putting pages in. They are handled a lot. All of the ones I have bought still look like new. The colors have never faded.