Color is one of the most powerful cartographic tools that you have. Here are two short videos about how to make and mix your own.
Make a custom color scheme in ArcGIS Pro
Learn how to edit an existing color scheme in ArcGIS Pro to create the most effective symbols for your map. You can find the data used in this map on ArcGIS Living Atlas of the World: Census of Agriculture 2016 – Livestock, Poultry & Bees https://esriurl.com/agri2016
Mix custom colors in ArcGIS Pro
Learn how to mix custom colors in ArcGIS Pro. Choose a color similar to the one you want for your starting point. Use the HSV color model to adjust its hue, saturation, and value levels. Use the eyedropper tool to mix colors that are harmonious with colors already on your map. You can find the data used in this map at https://www.naturalearthdata.com