you can adjust the "Hue and Saturation" (*ctrl+U*) and then click "colorize" ... move the sliders to get the colour you want, and adjust the "Brightness/Contrast" (*Layer --> Adjustments --> Brightness/Contrast*) to sharpen the blue and clean up some of the white... if you want to include some strong black into it also adjust the "Levels" (*ctrl+L*)

:)
retrocity