I had a lengthly answer typed out....it just vaporized... basics
You might remember I was a Paint Contractor for 28yrs. I did many...many garage floors...commercial floors....school floors big stuff, small stuff one thing in common for all:
Must last, be durable easy, to clean, AND easy to REPAIR. Concrete stain is what you want unless dealing with chemicals or food prep areas. Epoxy floors are pretty & pretty expensive...lol slippery when wet & difficult to fix, they chip , when cracks appear from settling a nightmare to blend/fix.
This is one of the finest products out there. Sherwin Williams & some big box store have it.
https://www.hcconcrete.com/index.jsp Home for site.
What I think you are looking for......... either way do NOT use any latex/water based products. Use the stinky, chemical laden, solvent based stuff for best results....it penetrates the crete, instead of laying on the surface. You'll have the door open anyway if doing your self. This stuff formulated for use in your state to resist salt chems etc.
https://www.hcconcrete.com/products/solid-color-stains/solid-color-solvent-based/index.jsp
I put this in the entrance area of a museum on an extremely busy tourist area, visited by thousands daily. 8 years later after being pressure washed countless times, It still looked new , even in the foot path area!
You must have a smooth, non fiberglass strand re-enforced concrete to use either this or epoxy with doing any prep other than basic cleaning first.
New floor ...or oil stained from parked cars, lawn mowers etc?
If interested in using concrete stain...PM me Justin ...I'll send my # and we can talk. 10 minutes talk time will pretty much determine if it's for you. I can't type that much.
This is definitely user friendly and can be done by you...if you can roll paint on a wall. Epoxy floor prep & finish best left to Pro's for a finish that will last.
Doing it your self or hiring out?
If hiring out,make sure they REALLY know what they are doing.
PS: This page is what I and many pro's use for staining & basically tells you how it's done. Etching/cleaning solution is just basic Muriatic acid, poured on , spread around, left to sit for time specified, then rinsed off/down the drain. No big deal.
https://www.hcconcrete.com/projects/Garage_floors/Stain_it/index.jsp
You can easily do this project yourself if you can use a roller like I mentioned earlier.
My guess would be 3-400.00 for a 2.5 car size for materials and application gear.
Greys & tans/beige best for hiding dirt/ marks and giving a high light /reflective ratio.
Drive in Twilight & Gull Grey were very popular for blending in with any decorating crap the woman had going on.LOL They have installation video's and color charts with some poking around.....good luck, my friend!!!!