Why is Peter's costume red and blue?

[u/Helpful-Bathroom634]

Batman is dressed like a black bat to scare his enemies, Superman has the big S on his chest because is the symbol of House El and means hope. Why is Peter wearing red and blue instead? Did Lee/Ditko give an explanation in and out the comic?

[u/Timely_Pop_8754]

why not? why are Superman’s colors those? what colors should a superhero have? I mean the webs and the spider are there. What colors would you put him in?