Transact-SQL Function that returns Color Delta CMC from Lab

Objective is to create a Microsoft Transact-SQL function that receives two color samples as input (Lab1 & Lab2) and returns the color variance (Delta E CMC 1:1) between the color reference and sample. FUNCTION fn_Color_DeltaCMC ( @L1 float, --Reference Color @a1 float, --Reference Color @b1 float, --Reference Color @L2 float, --Sample Color @a2 float, --Sample Color @b2 FLOAT --Sample Color ) Example: SELECT dbo.fn_Color_DeltaCMC(84.8,2.06,-5.78,84.8,2.78,-6.43) Returns: 1.050252 An online calculator can be found at: [login to view URL] You can use this calculator to verify that the function is working properly. The Mathmatic formulas for Delta E (CMC): [login to view URL]