BallistixI've searched on ebay, haven't found any 1,8mm in turquoise or cyan. Found some 3mm i turquoise. Post here if you find a supplier! :)
I may opt for cool white led's, I think they will seem a bit cyan when reflected from the backplate.
BallistixIf you don't mind going ghetto style (i.e. non-uniform result, unless she helps you with it, and potentially reduced LED lifetime), maybe bright white and nail polishing color of your choice will work wonders.
Also:
search
I've tried neither, just saying. Only testing it will convince you.