Kind of hard to see fine detail in that photo. Any penciling on this hen ? If not, looks to be columbian patterned, maybe a blue buff columbian. Are the males of this breeding buff, or blue chested ? If the male is buff chested would confirm columbian pattern
Now as to whether she is blue or splash may be another discussion. Depending on the line, if they tend to be very dark blue, she might be splash, but my money would be on her being blue. My splash buff columbians are much lighter necked and tailed.