You can change it in your preferences->themes->3D Viewport

[![enter image description here][1]][1]


color: Face Angle text

point size: vertex size

font size: you can change it here:

[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/Izhpm.png
  [2]: https://i.sstatic.net/yrHiS.png

but....it will change more than you want...i guess ;)