I wanted a simple color swatch that just showed the critical details. I didn't like the color swatches that had all sorts of fluff.
After I calibrate my filament I print this. This simple model has an unexpected benefit of testing both flow ratio and flow dynamics (aka pressure advance). You can see and feel if the flow is good by examining the top layer and you can verify the flow dynamics is good by checking the rounded corners.
I am including the Fusion 360 file.
For some filaments with long names you may need to decrease the height of the color.
For a box, use Filament Sample Box | Infill / Color Swatch | Remix2
For printing, I use the “0.20mm Standard” profile and the only setting I change is the Infill Pattern to Rectilinear.