If it’s purple when cut but eventually turns brown it is most likely Purpleheart.
Nice paddles.
Jim
That's a wonderful shop project for kids. But it starkly limns the differences in culture between Ontario and most parts of the USA, where kids would say, "What the heck would anyone need a canoe paddle for."
The variety of blade shapes is comprehensive, my favorite (not that it matters) currently being probably the 5th from the right. The patterns are creative. Great job by teacher and students.