Blued and stainless mix in a 1911

I don't know if you would have a problem, but I do kinda like the looks of the ones I have seen. 

Pretty is as pretty does. All about fitment and how well the two mate up. Before you buy either, take them to the dealer you wish to purchase the fame off of and do a quick fitment check. Nothing wrong with the RIA frame. Til you get done messing around with getting it to where you want it to shoot well, slap on grips, sights, etc. Probably have just as much in it as a custom box rig. Remember that a custom slide is fitted to the frame it's intended for. If it's too tight or sloppy, your gonna have to either scrap the idea or get it machined to fit. Just like piecing together an AR. Just because you buy quality parts doesn't necessarily guarantee you no jams or MOA.

STinky what's the definition of a "match" gun? Anyway a mixed color is ok if as others said it all works well together and shoots as well as you can accept or require for your use. Nearly any mix of slide and frame in a 1911 will "fit" together and function, meaning go bang when trigger is pulled. How well ALL the parts fit is what defines how "accurate" the gun will shoot & if it will be reliable. Trigger, hammer, bbl, bushing, link, pins, various springs, sights, grips, etc are all important too for both reliable function and accuracy. Magazines play an important roll too in a 1911. If your costs will run near the $1k range for a pieced together gun than you might just look for a complete gun either new or used.

No stainless bbl or slides for me.