I'm sorry Delaware, not a white leghorn. You could creat some using a RIR rooster and Delaware hen I believe.(rir carrying gold and Delaware carrying silver). The brain does not work very well when you have only been up 30 mins and it is 7 am
Yup, Rhode Island red rooster with Delaware hen will make red sexlinks. And I understand totally.

My brain does not function properly between 11 pm and 8 am.
I knew there was a good genetics person on here. I have a sex link question. Can my RIR rooster mate a Bresse hen and the chicks be sex-linked?
What color is the Bresse? If she is white, then I would assume no, not by color anyway. I don't know what kind of white Bresse carry, recessive or dominant, but either way a genetically 'white' bird can't (typically) be used for a sexlinked cross. Either the offspring will be all the same color split to recessive white, or the offspring will all be white. What you need is a genetically 'silver' bird like a Columbian, Silver Laced, or Silver Duckwing hen, which would then share that silver gene with her sons.
I'm not familiar with the Bresse, so I'm not sure what other colors they come in. If your birds are something other than white, though, then the answer is, 'it depends'.