In the "post your Craftworld" thread there's note about an old interactive colour scheme designer I was hoping to use as prepping to post in that thread.
Unfortunately the link is broken, prompting a search for a working version. From an old Warseer thread I saw a link to an IG version - http://web.archive.org/web/20051102090310/http://uk.games-workshop.com:80/imperialguard/flash-painter/1/
Playing around there led to a SM version - GW Online : Warhammer 40,000 : Space Marines : Interactive Space Marine Painter
Having changed dates on the archive I was able to find a version which referenced a much wider range of Eldar resources - including a link to this version of the interactive Eldar Guardian painter - GW Online : Warhammer 40,000 : Eldar : Interactive Eldar Painter
Sadly I can't get that to display the flash colour scheme tool - and having checked for other archived versions (another 17) I can't find any that work. I've tried all old versions of browsers supported in the IE f12 menus in case an older version of IE or other browser would see it work.
I'm guessing this is where the trail runs cold, but thought I'd check in case more technical minds had a solution. Also in searching here I found a couple of requests for the IG/SM version, which hopefully the link above assists other people in their quests for similar tools for their factions.
(One edit to correct link)