In the Envy line, Light Blonde is going to be the most similar to Jon Renau's Laguna Blonde, but this is an unrooted shade whereas Laguna Blonde has golden brown roots.
Envy does have a rooted blonde shade called Sparkling Champagne but it is a warmer blonde than Laguna Blonde.
Below, I have included the links to Heather's videos showcasing each of these shades:
Light Blonde: https://www.youtube.com/watch?v=iVBuk0KxE1Y
Sparkling Champagne: https://www.youtube.com/watch?v=L0PRARLdZZQ
I hope this information has been helpful for you!