The goal is to highlight numbers based the associated groups. For instance, all numbers in the "B" group are colored red, C is colored green and D is colored blue. Note: you may have to change the color of the number from black to white or another color in order for it to be visible.
The groups are located in the Update sheet while the actual coloring occurs in the Numbers sheet. Prefereably, let me select the numbers to color. For instance, Group if B3:F1628 is selected then only numbers in B:F are colored and none other. In this instance, the coloring occurs based where the numbers is in the Update sheet.
The first line is provided as a sample of the intended result in any chosen cell groups. Also included is a script that accomplishes the task but it is too slow when run on multiple cells. If you use the enclosed script please make it faster. Also, it was programmed for an older version of excel in case that helps any.