How can I stain this fireplace?

I have a 1970s brick fireplace wall that reaches from the floor to a vaulted ceiling with a raised hearth for seating. It extends to the corner of the next wall which is the start of window. The colors are ok but darken the room. As of now when you sit in this room you are facing a wall of brick that somewhat matches the mardi gras tiled floor in the kitchen. The room has beautiful hardwood floors. I would like to warm the fireplace wall up a bit using a little inspiration from about three of the colors in the brick. I heard about staining but cannot find any pics to give ideas to approach this. Need help!
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