Grille letter color change...

Did you purchase it from some where or do it yourself?

 

https://tvdvinyldecals.com/products...-for-2015-2018-4runner-trd-pro-grille-letters

Came out really well, quality product and Rich Rentrop (the owner I believe) stands behind his products.

Couple of tips:
Go slowly
Use extra soap in the solution
The "o"s are oval and take patience to fit. If the inner diameter bottom bevel is aligned properly it will fit well.
Don't get caught in a sudden rainstorm halfway through the install. The letters won't adhere properly as they need cure time. The company sent me a a new set which was nice.