Hi Darryl, I did not get what you mean by continues legend, but you can manually reclassify your legend. This link will give you more information. Classifying data by manually altering the class breaks—Help | ArcGIS Desktop
You won't be able to achieve this in ArcMap, at least not in your table of contents (you can still make a custom graphic legend on your layout). In ArcGIS Pro you can use the Unclassed Colors method to get the legend you want.