No - only because bleach removes color from anything. If your dye is in the same solution as the bleach, the bleach'll suck the color right out of it! But, if you dye the shirt a color afterward, the places you've bleached will be extra thirsty and be very receptive to color!Cool idea.
The definition of pacific is  the ocean off of California, or peaceful and tranquil. An example of something Pacific are the Hawaiian Islands in the Pacific Ocean. An example of something pacific is a lullaby.
There are multiple definitions of the Pacific Northwest, none definitive. In general terms the Pacific Northwest is the region of North American bounded by the Pacific Ocean on the west and roughly the Rocky Mountains on the east and running south to about the southern border of Oregon and Idaho.