Photo Re-coloring

hi have image converted graycale , add colors it. colors id use pms cool gray 9, , pms 433 dark grey. have these colors added swatches idk how use them in image.  image on right before , on left example colors mentioned. how do                                                                                                                                                                                                                                                              .  

experiment blending modes.

More discussions in Photoshop

adobe