Changing Colors of Editor Guides

ok i havent been able to find anything about this so far. if there is a post somewhere that covers this please refer me to that post.

id like to see the option to change the color of the ruler line and number (middle mouse and drag tool). the reason i ask for this feature/help is i have a image with the design that i am looking for and i use it for scaling purposes that is white with black outlines. when i use the middle mouse and drag, the line and unit number is white and i cannot see what the number is. id like to change this to a lime green such as the FPS numbers in the editor.