Oil blueing will give it a very cool finish.
Directions to blueing with oil.
Remove all parts from the slide (you are going have to remove the striker sleeve and replace it, order a new one before you start the project)
Remove all old finish/blueing ect. lightly sand or steel wool or scotch bright to the desired finish on the bare steel, don't be too concerned with the inside of the slide you are only finishing the outside for looks not the inside it will be OK.
After prepping the slide you will need to d-grease it. Use acetone, brake clean or some other d-greaser, acetone works great and is inexpensive and available at Home depot (use rubber gloves for this part of the operation not latex gloves)
You will need a Propane torch. You will need a way to hold the slide to the heat it, a metal rod in the striker channel would work OK, don't force it find a rod that fits loosely and you will need vice grips to hold the rod. You will need to heat the slide to around 570 deg. (drawing point of steel) You want to heat the slide up until you get a consistent darkening of the steel. The torch doesn't have to be set to full blast just enough to darkening the steel to an even looking bluish color. You are looking for an (Even Darkening) (This Is Important). As you are heating the slide take it away from the torch flame every once in a while to check and let it cool just a bit to let you see where the darkening is uneven, then back to the heat to get that even darkening. Once you have achieved an even dark finish drop the hot slide into your container of oil. Drop the whole slide in all at once, let it cool in the oil. Once it has cooled down take it out of the oil and clean off all the oil. You will need a container larger enough to immerse the entire slide in oil all at once. Any motor oil will work (not synthetic real motor oil)
The slide should have a nice dark blued finish. Reassemble your slide and install it on the frame, function check and you are ready for the range.