FDM parts are probably the most popular type of 3D printed parts. The FDM (fused deposition modeling) process is “melting” a solid thermoplastic filament, like a hot glue gun. If you plan on testing your parts in a strenuous process, FDM may be the best choice. These materials specialize in high tensile strength and resistance to high temperatures.
Color for FDM parts are available in a relatively wide range of colors in the most common materials like ABS and ASA. And if you can't get the exact color directly from the filament you're using, there are a variety of other methods you can use.