Tiny accident with hair dye - dangerous?

I was at the hairdressers today and he was applying highlighter (permanent) with foils. He accidentally knocked my lips with his hand (which presumably had dye on it - he wasn't wearing gloves). I didn't think too much at the time, but now I am worried that ingesting some dye might be dangerous. My mouth isn't stinging but I do have a slightly odd taste in my mouth I can't get rid of.