Color Search: RGB vs HSL

RGB is an "optimistic" case. RGB mode works better if database contains colors that close match the color you're looking for.

HSL is a "pessimistic" case. HSL works better if you're looking for some specific color that does not have matches in the database, and you wish to select "best from worst". HSL mode selects the colors that match by HUE, then you can correct the lightness by adding a white / black paint.

Seek RGB match:

Seek HSL match:

RGB and HSL search calibration

	RGB calibration: Error minimization in RGB search is a minimization of error weight function: F(Kr*(Ri-R0), Kg*(Gi-G0), Kb*(Bi-B0)) -> min, where: R0, G0, B0 - color you,re looking for Ri, Gi, Bi - color from database checked for match Kr - weight factor for red match Kg - weight factor for green match Kb - weight factor for blue match
	HSL calibration: Error minimization in HSL search is a minimization of error weight function: F(k*(Hi-H0), (Si-S0), (Li-L0)) -> min, where: H0, S0, L0 - color you,re looking for Hi, Si, Li - color from database checked for match k - weight factor for hue match