I don't think there's any one-stop place to learn how to do it. I've never gotten a chance to blog about (too many other things) but you have to be quite good w/JS in the browser.
Hi @SanfordWhiteman -- I'm aware this is an old thread but I'm really keen on how to replicate this. Been playing around with script variables and mktoColor code but can't seem to get it to pull through! Just want to be able to pre-populate the custom colour fields with brand colours.
Ah, this old one! Unlike other semi-hacks I post on the Products Blog it’s too extreme — as moderator it’s especially inappropriate for me to post it. I have the JS still around if you want to DM me and get on a Zoom to discuss it.