You do, however, need color vision to tell that the control line changed from blue to red (which the instructions tell you to do to verify that the test is working correctly)
The control line doesn't show up until the buffer solution has wicked along the test strip, so the verification is "does the line next to the letter C show up?"
The directions indicate to verify that the blue control line is present prior to adding the swab, and that the test should not be used if the blue line is not present.
You can verify this for yourself by downloading the official instructions here: https://www.fda.gov/media/141570/download
See pages 6 and 7: https://www.fda.gov/media/141570/download