If you want 5 buttons, you will need 5 different Subs where the only thing that changes is the name of the Sub and the colour setting. You make one Sub per button.

Do you have an image editor on your Mac? If you take a screen capture while displaying the available highlight colours, you can then select the region of each of the coloured boxes and copy each as a separate image and paste those into the button image which aligns with the Sub your button runs.

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Andrew Lockton
Chrysalis Design, Melbourne Australia