If you are using set you can do it as below.
D:\Projects\QA Automation\Main\DeBeers_Automation>set chromedriver="D:\\Projecs\\QA Automation\\Local Repository\\org\\seleniumhq\\selenium\\selenium-chrome-driver\\2.53.1\\chromedriver.exe"
And in the code, you can get it as below.
System.setProperty("webdriver.chrome.driver", System.getenv("chromedriver"));
You have to use -D in case of if you are passing it as a maven command argument as below.
>mvn clean test -Dchromedriver="D:\\Projecs\\QA Automation\\Local Repository\\org\\seleniumhq\\selenium\\selenium-chrome-driver\\2.53.1\\chromedriver.exe"
Hope this helps.