*cue hipster ‘tude* ugh. it’s sooo mainstream. *end hipster*
But seriously, everyone’s using it. and you might be saying “But Mike, the sky and the ocean are blue, and they’re beautiful!” you’re totally right. Even my background picture that I took in San Francisco is a fading blue skyline. but check it and see:

eiffel 65 would probably love this.
Look at all the blues!
So, I did a little thinking + research.
Obviously, blue is part of the primary color set of Red, Green, & Blue. I had a few red buttons (4ish +/- some pink/purple/orangey ones). 4 more green ones (notably, the phone and messages buttons). Yet, I’ve got a full page of blue ones. Ones that aren’t uncommon for lots of people to have. In fact, I’ve got even more blue buttons. And quite frankly, all the blues are making me sad.
So, some basics about color theory. If you’re too lazy to learn, there’s here’s the abridged version:
“Cool colors are best used on professional and clean-cut sites to achieve a cool corporate look. Cool colors stir up emotions of authority, establishment, and trust. For example, cool shades of blue are used in many banking sites, such as Chase.”
“Blue is a peaceful and calming color exuding stability and expertise. It is a common color used in corporate sites because of this. Blue can also symbolize trust and dependability.”
But to add some validity to those sad feelings I was getting just a mere couple paragraphs ago: “”A cool shade can bring about the negative side of blue, symbolizing depression, coldness, and passiveness.”
And extra, super-duper abridged for some others:
red – passion / rage (valentines day vs. bloodbath)
yellow – joy / caution (sunflower vs. yield sign) … and sidenote: yellow is the most fatiguing color.
green – nature / greed (plant-life vs dolla dolla bills)
Back to the “cool corporate look” that blue is just oozing. I get it. But what I don’t get it is why some websites are using blue. Sure, we want to be professional and/or trusting on LinkedIn, Delta Airlines, Dropbox, and (maybe) Google. But (online privacy concerns aside), how much trust do we need to put into Facebook, Twitter, Reddit? (Maybe privacy concerns is the big glaring item of trust?) Words With Friends? Pandora? and Zappos?
In fact, I’d really like to hone in on Pandora and Zappos.
Pandora lets you stream music, an unbelievably creative outlet full of artists sharing their passion. I’m curious how many #1 records have a ton of blue on their album art. Oh, that’s right, I have the Internet at my fingertips!
35 Beautiful Music Album Covers - a few here with heavy usage of blue, but not many
79 Amazing Album Covers - again, a few blues, but not many (if you go to the 99 Best Designed album covers from the same guy, there’s actually a fair amount of blues, but not a majority)
Let’s take this just one step further, though. How many Blues genre album covers are blue?! (Sadly, I’m getting a little tired, but here’s some cool info about “blue notes”). And granted this is just another internet blog, but I’d argue somewhere between 4-6 of these 20 albums make the color blue a main focus of their cover.
And check out the album covers for the “ambient” genre on this page.
Anyway… I almost forgot about Zappos, which sells clothes. Clothes are how you make yourself unique and influence first impressions. Ok, so blue isn’t that bad for clothing, but neither are the other colors! Right?!
And finally, some science! Blue has the shortest wavelength of the RGB colors (see exhibit 1, below). Which means it’s the least straining on the eyes (I’m actually assuming this, but guessing I’m spot on). Read more here, if you so desire.

exhibit 1
Ok ok, I get it. Blue is good. Makes people think you’re honest, of utmost quality, etc. It puts the least strain on your eyes. But gawd, does it get boring. Let’s let some green and red into our lives. Mix things up! Keepin’ it real, as the kids say.
p.s. But avoid too much yellow, it hurts my eyes. ><