A practical question about personal palettes

My first sewing projects will be simple tops, and I would like their colors to fit into a small wardrobe. The fabric shop sells generous lengths, so choosing poorly could leave me with material I cannot easily use elsewhere. The clothes these tops need to match are mostly grey trousers and denim, rather than a particularly colorful collection. I am gathering swatches in dusty green, burgundy, and cream to see which combinations feel easiest to wear. While looking for a way to organize those observations, I came across personal color analysis with the intention of making a small purchasing decision before exploring seasonal labels in more detail. Is a low-cost trial garment a better next step than spending longer with the loose swatches? Suggestions that connect color choices with beginner sewing decisions would be particularly useful at this stage.