formula DeltaE2000

Hello, Can somebody tell me that the outcome of deltaE00 2,87 or deltaE00 5,74 is correct with the next values: - reference L=41,880 a=3,500 b= -33,190 - measure L=40,488 a=9,092 b= -37,342 I try to use the formula in a PHP or javascript environment but I think there is a small error in it… Maybe someone has the right formula for me. Thanks in advance! grz. Paul Yntema