title: dotless.compiler Invalid RGB color string
body: <p>Hi i'm using Powershell and dotless.Compiler.exe version 1.3.1.0 to compile my less files.
  I'm getting a error trying to compile a less with a variable using a background color.
  So I have the value</p>
  
  <pre><code>@varBodyBg: #669900 repeat-x left top scroll url(images/img.png);
  
  @varBodyBgString:"@{varBodyBg}";
  @varBodyBgColor:color(@varBodyBgString); 
  </code></pre>
  
  <p>But I'm getting this error trying to use the function color:</p>
  
  <pre><code>Invalid RGB color string '669900 repeat-x left top scroll url(images/img.png)' on line 5 in file 'MainFile.less':
  [4]: @varBodyBgString:"@{varBodyBg}";
  [5]: @varBodyBgColor:color(@varBodyBgString); 
       ----------------^
  </code></pre>
  
  <p>Or if the</p>
  
  <pre><code>@varBodyBg: rgb(0,0,0);
  </code></pre>
  
  <p>Give the error</p>
  
  <pre><code>Invalid RGB color string 'black' on line 4 in file 'MainFile.less':
  [3]: @varBodyBgString:"@{varBodyBg}";
  [4]: @varBodyBgColor:color(@varBodyBgString); 
     ----------------^
  </code></pre>
  
  <p>Someone can tell me how to resolve this?</p>