I was looking up greenbottle blue tarantulas*-- themselves an utterly stunning species– when I came across an Instagram photo that I thought had to be fake, or at least heavily altered. No way did spiders come in that vivid a shade a blue. I’d seen too many “blue” and “purple” critter pics in the past, and I wasn’t going to take just take it at face value.
Well, lo and behold. Gooty sapphire tarantulas are really a thing (albeit only blue in direct light). I can’t swear that every picture is 100% unmodified, but even the less-saturated ones are incredible. This is the coolest thing I’ve learned all day.
*because my friend just got himself a juvenile greenbottle. He’s promised to send pictures when he has them. She sounds gorgeous.
Those are all some amazingly beautiful spiders. I had no idea some could be so colorful! Best to your friend and his new crawly pal. 
Share pics when you get them, will you?
Far out! Those are some groovy spiders. I bet if all the spiders were colored like that we would have way less cases of arachnophobia. Who could be afraid of a blue and purple creepers?
I remember a year or so ago, someone posted a link to photos of a very beautiful tarantula, larger than my hand and daffodil yellow.
Surely the winner in the full-color spider contest is the peacock spider. Unlike the OP’s tarantula, they even win the dance competition. 
I did notice an error in the care instructions on the Greenbottle page in your first link. It says:
[ul]
[li]20 gallon aquarium with locking top.[/li][/ul]
The actual requirement goes like this:
[ul]
[li]20 gallon aquarium WITH LOCKING TOP.[/li][/ul]
