Best practice to best illustrate side navbar children

I have this Side Navbar with children. I am not sure that the way I am illustrating the children is the best way of doing this.

Questions - Is this the best way for me to illustrate navbar item's children? Is there more I can do to improve presentation?

primary: "#33404D",
secondary: "#465666",
accent: "#FFAB00"

First Attempt - Take 1(Oldest version of the component)

Second Attempt - Take 2

Third Attempt - Take 3