You are possibly thinking of the AXA logo
axa
Hellmanns
The Tesco logo is one logo with a blue S and a red line underneath.
Regency films has a blue curvy R on a black background, kind of similar to morgan creek logo.
A logo with a blue background and white letters could refer to several brands, but a prominent example is the Facebook logo. It features a simple blue square with white lowercase letters spelling "f." Another example is the LinkedIn logo, which also uses a blue background and white lettering.
Worldpress logo or volkswagen
The Billabong company uses a black background with a white wavy line for a logo.
Blue with a coloseum
The camera company Minolta has a blue circle with white lines.
Pandora has a white box and blue P.
Ah, I see you're talking about the logo for Superman! That iconic blue "S" with a white line running through it is a symbol of hope and strength. It's a reminder that we all have a hero inside of us, just waiting to soar to new heights.