title: Visual studio 2017, editor different color
body: <p>Today I opened VS2017 and suddenly, the color of text in the editor has changed.
  I tried to find solution on internet but no success. I repaired VS2017 but still no success.
  Do you have any idea what is causing this?
  <a href="https://i.stack.imgur.com/LhO0r.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LhO0r.png" alt="enter image description here"></a></p>