Well, I purchased horns that were not advertised as 'hellas' they were completelly different brand and different name, the only thing they had in common was the shape and color.
They are base red, but I will be repainting them yellow. Now these costed me 25yoyos, hellas goes above 100yoyos, so, even if the horns I have there now doesnt look good in two years, I can either respray them again, or buy another set for 25yoyos and it will still come cheaper.
Sound they produce is questionable, the store I got it from did test them and said they are extremely loud, but I have to test them yet on my own
edit: just to clarify, this is something, that does not have any impact on safety nor handling of the car, so saving few chips here isnt as much of a crime as buying fake brembos imho