If Text Of Cell In Range Matches Text Of Cell In Column - Match Formatting

Trying to create a button that, once clicked performs the following task:

Checks whether the text in a cell in the column X2:X40 matches the text in a cell in the Range A2:U14.

If it does, the formatting of the cell in X2:X40 (eg background) must change to match that of the corresponding cell in A2:U14.

Only 1 cell in the range will match 1 cell in the column

For example:
Before click:
Cell A9 has "John" written in it and a yellow background
Cell X4 has "John" written in it and a clear background

During click:
matches these cells
changes X4 so that it also has a yellow background

After click:
Cell A9 has "John" written in it and a yellow background
Cell X4 has "John" written in it and a yellow background