Light text on a dark background

Light fonts on dark backgrounds are HARD to read. One way to compensate is by using BOLD so the letters are thicker and thus easier to read. I recommend printing a sample of your LO in the exact size you'll print the final--then hand it to someone else to read it. Not knowing the story, they will be a good judge of the readability.

On a medium background, using a shadow--very small--behind the text can also improve readability.

PS. Remember readability in an online gallery or on your screen does not equal readability in print. Always test first!