It's petrel, not petrol, when talking about the colour...

[MirandaGoshawk]

It's spelt wrongly in all the bloody clothes catalogues. Have they not noticed that petrol, if you spill a drop a fiver's worth is clear?

A petrel, OTOH, is a bird. A blue one. Petrel blue. Can we start a campaign?

[FriskyMare]

Umm...think you are wrong.

Petrol is derived from petroleum which can be a bluish colour (look in the OED)

Isn't a petrel black and white...

[hambo]

i thought petrels were brown??!

[Mabelface]

Petrels are brown or brown and white, aren't they, whereas petrol is blue?

[BunnyLebowski]

Erm..........nope.

[alarkaspree]

Petroleum

<a class="break-all" href="http://www.google.com/imgres?imgurl=upload.wikimedia.org/wikipedia/commons/6/61/Oceanites_oceanicusPCCA20070623-3634B.jpg&imgrefurl=en.wikipedia.org/wiki/Storm_petrel&h=463&w=512&sz=48&tbnid=1a8_7kgvIoCB7M:&tbnh=90&tbnw=100&zoom=1&usg=__hMPrRXJu7SX2LuAtnnJWYpl5Aks=&docid=x4iSx9YyDtiMpM&sa=X&ei=QABgUvijJ82g4AP594HwBA&ved=0CEIQ9QEwAg" rel="nofollow noindex" target="_blank">Petrel

[BananasInNegligees]

Oh, I'm a bit embarrassed for you OP.

You're wrong.

[Apileofballyhoo]

I believe there is a blue petrel - but I think the colour is petrol blue. I have never seen it written as anything else. Haven't my OED to hand.

[MirandaWest]

this says many people believe it is petrel blue but it isn't

[MirandaGoshawk]

I can't get onto either of those links.

https://www.google.co.uk/search?q=blue+petrel&rlz=1C1CHNU_enGB412GB499&espv=210&es_sm=122&tbm=isch&tbo=u&source=univ&sa=X&ei=yiZgUpCALu6p0AWAioCADA&ved=0CDkQsAQ&biw=994&bih=611&dpr=1#facrc=&imgdii=&imgrc=g7iL6QRPeih3NM%3A%3Byt4_ucDgJm4S6M%3Bhttp%253A%252F%252Fwww.avianweb.com%252Fimages%252Fbirds%252Fseabirds%252Fbluepetrel.jpg%3Bhttp%253A%252F%252Fwww.avianweb.com%252Fbluepetrels.html%3B296%3B355 here we go - petrel blue My DH is a birder.

[MirandaGoshawk]

I'll try again! [[https://www.google.co.uk/search?q=blue+petrel&rlz=1C1CHNU_enGB412GB499&espv=210&es_sm=122&tbm=isch&tbo=u&source=univ&sa=X&ei=yiZgUpCALu6p0AWAioCADA&ved=0CDkQsAQ&biw=994&bih=611&dpr=1#facrc=&imgdii=&imgrc=g7iL6QRPeih3NM%3A%3Byt4_ucDgJm4S6M%3Bhttp%253A%252F%252Fwww.avianweb.com%252Fimages%252Fbirds%252Fseabirds%252Fbluepetrel.jpg%3Bhttp%253A%252F%252Fwww.avianweb.com%252Fbluepetrels.html%3B296%3B355 hope this works]]

[MirandaGoshawk]

So, not so fast, bananas

[RustyBear]

But the blue petrel is grey, it's really not petrol blue...

[iklboo]

Noun
petrol blue

(UK) a greyish blue colour, tinted with green.
Usage notes
Many people erroneously believe that this is a misspelling of petrel blue, and that the term refers to the sea bird. However, the OED gives only this spelling. The term may originally have pertained to petrol-derived compounds such as paraffin, which is often coloured blue.

[iklboo]

Bottom! That posted without my comment on so it sounds all snotty!! Sorry, not my intention - even at my most pedantic.

[MirandaGoshawk]

My dictionary (Collins) gives a difference between petroleum, which it says is greenish-black, and petrol, which is refined petroleum. The stuff we get at the pumps isn't greenish-black. Or blue.

[IHatePingu]

I always assumed that the colour petrol referred to the bluey-purply colour effect you see when petrol is spilled into a puddle.

[MirandaGoshawk]

Here's another pic: here

I see that part of its latin name is cerulea which is blue.

[MirandaGoshawk]

You get the whole rainbow, don't you?

[BooItTooJulia]

Bananas

[RustyBear]

Ok, I knew I'd read something about petrol being blue - in Arthur Ransome's 'We didn't mean to go to sea' (published 1937) some children sailed to Holland - when they wanted to fill the boat's engine there was a confusion because paraffin in Holland was called petrol and coloured blue to distinguish it from benzine (which was called petrol in England)

[Orangeanddemons]

Oh, online retailers are always making silly mistakes. Sequences for sequins.....

[MirandaGoshawk]

Maybe for boats it's coloured blue to distinguish it from other clear or pale liquids. But the stuff we get at the petrol station is not blue!

The thing is that when I was a child, that particular steely-blue colour was always petrel blue, then over the years I saw it more often described as petrol. It sort of morphed, which is why I think that the old way is teh correct way.

I'm usually right which by the law of averages means that sometimes I must be wrong. I would like to get more info on this. If 'petrol blue' turns out to be the correct spelling, then I will be willing to admit that I've held onto a misinformed belief for a very long time .

[RustyBear]

Well, I don't know how old you are, but when I was a child (I'm 57) that colour was always petrol blue. Until I read this thread I have never seen it spelled petrel.

[SwedishEdith]

There used to be Esso Blue which was kerosene. It would have been dyed to distinguish it from taxed fuel.

[Hassled]

I don't care if Miranda is right or wrong - I've learned that there is a name for a shade of bluey grey, and prior to this I had no idea. This thread is a valuable public service.