This is the classic war poster "Keep Calm and Carry On" reworded to "Keep Calm and Call A Lawyer". The words "Call A Lawyer" are added as though they're on a sticker (or a stamp) over the original wording. This is a funny, clever design that is good advice in so many situations.
I've put this on a red background, but you can change that really easily. Hit 'Customize it' and then 'edit', and you'll be able to change to absolutely ANY color you prefer.