Use the numbers 1 through 6 in the cells below so that each row, each column and each colored region contains exactly one of each digit.
From Mensa Puzzle Calendar 2019 by Fraser Simpson, Workman Publishing, New York. Puzzle for April 16.
+---------------------------+
| 4 2 3 5 1 5 |
| 5 3 6 1 2 4 |
| 1 5 4 3 6 2 |
| 6 1 5 2 4 3 |
| 3 4 2 6 5 1 |
| 2 6 1 4 3 5 |
+---------------------------+