title: converting XYZ color to RGB
body: <p>color-primary transformations</p>
  
  <p>Does anyone know of any formula for converting a XYZ  to an RGB value?</p>
  
  <p>how   find rgb from XYZ in this pic?
  <img src="https://i.stack.imgur.com/hziJw.png" alt="enter image description here"></p>