(RNN) – Could you pick Facebook's trademark shade of blue out of a line-up? What about Twitter's?
Nokia, Intel, Dropbox, Samsung, Skype and Instagram all use a different shade of blue, and a website called Name That Blue challenges you to tell them apart and keeps track of your progress.
You can also test your knowledge of similarly adorned sports teams with the NFL, MLB and NBA variants.
It's not as easy as it may sound, and the color blind need not apply.
If blue isn't your thing, or if you want to give your rods and cones the workout of their lives, there is an all-color option at the bottom. Enter at your own risk.
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