Choose your options, and the project will give you a bookmarklet for Desmos with the colors you have selected Note: Any equations you have put a custom color on will remain the custom color, even after you reload. However, if you want to make more equations a custom color after you reload, you will have to use the bookmarklet again Another Note: The inverted colors are not permanent. They reset on a reload. If you just want to invert the colors, use this command: javascript:Calc.updateSettings({invertedColors:true})
This project is very basic and did not take long to create. It is not meant to be aesthetically pleasing or easy to use. Keep in mind that this project was created merely for the functionality of creating the custom bookmarklet.