Seriously, if you put in brands like the things you use every day (cosmetics, shampoos etc) their hazard levels are mosty above 4, many of them are in the reds. I don't think the fact that only manic panic exists in the database, that means that say, Directions, is of lower toxicity. It doesn't contain all products out there (it says at the about section that it has 1/4 of the available products, but I suppose they're talking about the products available to the country of the website).
Check this out:
http://www.cosmeticsdatabase.com/product.php?prod_id=100642
Just an eyeshadow, that you'd think is more innocent, has scored 7. And they're all higher than 4-5. You only use the dye like once every month or two, while these products you may use every day.
Not saying that you shouldn't be careful of what you use, just that mostly everything we use that is chemical and not of vegetable origin has something that is potentially dangerous.
Are you sure that that colour is a puple, by the way? Because mahogany is supposed to be a reddish/brown colour.