Change colour of cells based on another cell's colour (Not value)

Hello,

I want to be able to change one cell to any colour and then have several cells throughout change to the same colour. I don't want this to effect the data I'm able to enter.

This is, I want to be able to fll B4 with any colour and then have B7 and B10 to change to the same colour.

Any help is appreciated.

Sorry, I don't know what VBA is exactly. I googled it and got 'Visual Basics Applications' but still doesn't help.

I know what I would do if this spreadsheet was just for me, I would just change the colours manually as needed, but I plan to give this to others who can't be as bothered.

I want to make it as simple as possible.

I dont want to target one colour only. I want ot be able to choose any colour at any point and have the others change themselves.