Some may laugh at this, but it has annoyed me for years.
There is a colour described as “Petrel Blue” which relates to a bird of a similar name, the Blue Petrel. But because it is pronounced like the fuel that you put in your car, the word has been spelt incorrectly over the years and it has now become, “Petrol Blue” which is funny in itself as petrol is not blue in colour!
I have seen this colour mis-labelled everywhere and it continues to irritate.
So when you see a colour described as “petrol blue” know that it really should be, “petrel”