title: CGContextSetRGBFillColor too few arguments
body: <p>I am trying to set a color to my CGContextSetRGBFillColor in this way:</p>
  
  <pre><code>- (void) drawArrowWithContext:(CGContextRef)context atPoint:(CGPoint)startPoint withSize: (CGSize)size lineWidth:(float)width arrowHeight:(float)aheight andColor:(UIColor *)color
  {   
  CGContextSetRGBFillColor (context,color,color,color,1);
  CGContextSetRGBStrokeColor (context, color.CGColor);
  
  ....
  }
  </code></pre>
  
  <p>...but I am getting in both cases the error "Too few arguments, should be 5, are 2". How can I fix this issue?</p>