I have a star that I would like in a specific color, but am having issues changing it with the replace color and/or color replacement tool. The image is small, but I am trying to have all the pixels. The color I want to use is Pantone solid uncoated 655 U.
This is the image I am trying to change.

Please help, I can't figure out what I'm doing wrong.
This is the image I am trying to change.

Please help, I can't figure out what I'm doing wrong.