Show HN: Name That Blue - How well do you know your digital brand colors?

Can you tell Facebook's blue from Instagram's blue? Know your Twitter from your Dropbox? Test your skills using my latest hack:

Name That Blue http://colin-gourlay.com/namethatblue/

Most of the hex values are sourced from http://brandcolors.net/ (thanks @galengidman!), but I'm slowly adding others to make the challenge more engaging.

I'd love to know what you think! Thanks