Smooth Transition of Colours

Here is an interesting link that I found online (Smooth Transition Between Selected Colours) It depicts the transition of colours from “A” to “B” via means of a dynamic slider. In the Colour boxes shown on the left and right mouse over and select a starting colour from the box and then do the same on the other colour and whatch the transition. I would have liked to have seen a window indicating the RGB transitions in a digital format ie. 0 – 255 on all channels, similar to that of mousing over various colours on an image within Photoshop.