Schedule of activities with cell color

Good morning, community.

This time, I'm trying to simulate a schedule of activities.

The fixed cells I should have are 168, 24x7, horizontally, and above them, the time and reference.

And 3 fixed cells on the left side vertically that tell me from what time to what time the cells should change color and their difference.

I tried to do it with TableViewer1,
but I can't find a way to colorize certain cells.
Similarly, I'd like to keep the first 3 columns fixed.
It should only shift from 1 to 168.

Any suggestions?

sample excel

sample

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