Ladies, you have so many secret techniques, thank you all for sharing! Let me share mine. It is is very very simple but haven't failed me even once (gotta spit 3 times over my left shoulder not to jinx it). I only use Jubilee DELICATE by Johnson: dissolve a little in a tub of cold/room temperature water, let it stay there for a while, then I just swirl my scarf around very gently kind of rubbing it, then I rinse it, pat dry and let it semi-dry. Then I iron it and voila. Looks and feels just right and colors never fade; works just as great for cashmere and silk, etc.
Guccig, if I were you I'd find some reliable and gentle color restorative liquid for your scarf. Sorry it happened but I'm sure you can restore it. Good luck!