Blue backing cards?

Blue backing cards?

How do we feel about the blue backing cards?⁠

At my last market I put my pins on blue backing cards cause to be honest, I have loads of them. When I first made pins I didn't know if I should go with blue or white and, though I love the white more, I don't want to waste all these blue ones.⁠

Would you mind if you got pins on blue backing cards instead of white? They're totally identical apart from the colour! ⁠