There are some Heros species wild collection locations with varying amounts of blue, occasionally imported, none are what I'd call electric. About 1991-1992 I saw what they were calling "blue severums" at a shop in Cambridge MA, not identified by place of origin-- very nice and you could legitimately call them a blue fish, almost a lapis color, but you wouldn't call them electric. I've seen some 'red spotted turquoise severums' for sale (not AZ Gardens), nice color if the photos can be trusted, I don't know their origin.
Summing up, I've seen severums with some nice blue or turquoise in them but I've never seen or heard of 'electric blue severum'.