I used to spend a lot of time trying to find "close enough" alternate paints so I could save a couple of dollars on touching up this or that. After many years of trying, I learned that the only correct paint to use is the correct OEM factory paint. In my case, Kubota paint was not only the correct color but was a higher quality acrylic enamel but would last longer, maintain color correctly and match whatever color was already there. The close enough paint looked out of place and you could always tell where it was. We've all seen that.
By contrast, the alternate paints were often lower quality so the "savings" weren't really there. it was merely paying less for what almost always was a lower quality product. When quality and contents were compared, we were probably paying more for what we were getting than if you were comparing apples to apples rather than just initial price.
When you have a $25,000 to $50,000 tractor and save $10 or $20 on paint over the life of the tractor, that's probably not a good idea for several reason. It doesn't match, affects pride of ownership and will usually lower resale values by making the item less attractive and the buyer skeptical of other maintenance. OEM makers put their best foot forward on their paint and usually offer it at a great price to keep their products looking nice. Plus they make it proprietary in that it's an exact color that is difficult to easily copy.
Here's an example of the correct factory acrylic enamel --Orange II--paint on an insignificant item like a bucket. Look at the pop of the color and the beauty of the real McCoy.
How about a wheel or center?
That was with a spray gun. How about a rattle can on a front axle touch up? Tractor sat outside for 14 years.
Remember, for many years I tried the alternate of Rustoleum or whatever I could get so I'm not being critical but just trying to show what has worked for me. I still use a Rustoleum color on a dirt engaging implement sometimes just because I have it or it's easier. But even then, here's the correct OEM paint on an old harrow. Look at that red pop.