The hex code field in Canva makes it easy to make sure you use the exact shade of a color between multiple designs or multiple elements within the same design. For example, let's say I've found a really nice shade of green that I want to use in three parts of my design. I could try to use the color selector and hope that I get it exactly right each time. Or I could copy the color hex code from the first part of the design and then paste it into the other parts of the design. Watch this video for a demonstration of how to use the color hex code field in Canva.
Video - A Quick Tip for Using the Same Color in Multiple Canva DesignsYou can learn much more about Canva in my playlist of more than 50 Canva tutorial.