You are kidding... sure -it works but you can't look at it for longer that 10 minutes at a time! I fail to see the reference to Yosemite as relevant. Did Apple remove all the colour/color from the UI? Did they decide to notch up the white intensity to the top end of the scale? Did they decide to make the icons so ineffective they might as well not have them?
I agree with the majority of comments here. The new color scheme is bloody awful. Where has the style gone Evernote devs and designers? Are you tying to make our experience with your tool a boring & dull, high contrast misery? If so you've done a great job. I want the old version back and spend your time sorting this out before you add any more features that I don't need.