Try this, it will get you where you want to go quicker and with no editing artifacts:
- Add a new blank layer on top of the image
- Click on the foreground color icon and enter the color you want in the Hex color box
- Fill the new layer with this color (or any other color yo want), this will cover your image entirely
- Change the blend mode to "Color"
And you will see the result you want. See the screen capture I added below.
If the selected color does not do the job or you change your mind, you can easily fill the layer with another color with no penalty or editing artifacts. And, if you do not want that color change any more you can simply delete the layer or turn its visibility off.