Years ago when I first met Bootstrap, when it still called itself Twitter Bootstrap, I searched how to colorize it, changing the default white/blue color scheme.
I remember there was even an online tool I could upload a random picture and it would generate a separate CSS file with its most noticeable colors, which I also could edit here and there in case their algorithm didn't match my wishes.
Today, using Bootstrap 4, not only I didn't find such online tool anymore but I also surprisingly didn't find anything at all related to a way to change the color scheme of Bootstrap version 4 (let's emphasize that)
Is there anything like this nowadays that would help automate a little bit the process?
Note: Preferably without requiring knowledge of LESS/SASS/SCSS nor anything like that