Probably just a little "sunburn". You will notice the darker color on the sunny side of the peppers if that is the cause.

Mine that were more exposed to sunlight had it last year. Nothing to worry about.

yea thats fairly normal....no worries

i have purple jalapenos in my garden right now so i would say maybe not

the purple is a natural sunscreen from what i was told many peppers will do this when they get too much direct light so i do agree with NOTROD its normal

hope this helps

your friend Joe