title: Specifying colour tints in CSS: RGB vs RGBA
body: <p>I need to specify a number of variants for black and white colors. I've been given the variants as a percentage of the solid color.</p>
  
  <p>As a non-designer, the question I have is, should I simply specify them as RGBA, or should I use something like photoshop to get the actual #hex RGB value and use that.</p>
  
  <p>The reason I ask is because some of the variants have very low opacity and will naturally take on the background tone, rather than be a true solid grey. </p>