It looks to me as if lab2rgb is returning colors scaled as floats between 0 and 1 while colormine.org is returning 8 bit integers scaled 0-255. Try multiplying by 255 and comparing the outputs. On Mar 27, 2017 7:02 AM, "Michael O'Brien" <mob.irl@gmail.com> wrote: Hi all, If I use the following array of LAB values array([[[ 48.07851346, -14.69400135, 25.2170507 ], [ 63.21232753, -3.65444198, 6.67734193], [ 45.80027308, -2.47952304, 11.5073341 ], [ 46.84900559, -10.37025167, 19.92527996], [ 44.92476952, 19.36861848, 2.97238555], [ 35.50132805, 5.89086564, 1.95259827]]]) and use the following code to pass the array to lab2rgb rgbcolours =color.lab2rgb(ClusterColours.values[np.newaxis]) I get the array array([[[ 0.40929448, 0.47071505, 0.27701891], [ 0.59383913, 0.60611158, 0.55329837], [ 0.4393785 , 0.4276561 , 0.34999225], [ 0.4159481 , 0.4516056 , 0.3026519 ], [ 0.54449997, 0.36963636, 0.4001209 ], [ 0.36970012, 0.3145826 , 0.315974 ]]]) but on colormine.org if I enter the 1st of the LAB values I get 105,119,70 for RGB and not colours so close to black Where am I going wrong? _______________________________________________ scikit-image mailing list scikit-image@python.org https://mail.python.org/mailman/listinfo/scikit-image