The best alternatives to Color Safe are Contrast, Fix contrast, and Contrast Safe. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Color Safe?
AssemblyAI— The most accurate API for conversational speech-to-text
Low contrast text is the most common accessibility issue and affects 86.4% of pages. This free extension based on technology developed for Polypane (https://polypane.app) automatically fixes contrast issues on any site you visit.