You Do Need power plug adapter while traveling from Colombia to Tuvalu.

Here is Why You Need An Adapter

The outlet and plug type used in Tuvalu is I and in Colombia are A and B. This is how they look like.

Colombia

In Colombia, outlets of type A and B are in use.

Type A

Type B

Tuvalu

In Tuvalu, outlets of type I are in use.

Type I