MS Excell 2013 Compare two time values +/- 1 minute 1

[puforee]

I have two cells on my spreadsheet that have time values HH:MM. Formatted [h]:MM. I have a third cell that uses a formula to show OK if they compare and NO if they don't. However one of the cells could be 1 minute +/- from the other. If this occurs I still want to show OK. So,I need a formula that checks that the two cell times are the same +/- 1 minute. I have searched and found +/- for numbers but not time.

Here is the third cell formula =IF(L2=L3,"OK","NO")
How do I get the +/- 1 minute into this formula


Can anyone help?

 

[strongm]

=IF(ABS(L2-L3)<0.0007,"OK","NO")