Bobs don't really come "in colors" like coturnix quail. It is hard to tell with your lighting what colors they are sporting. If they were bred with Snowflake Bobs, Butlers can lighten up quite a bit. Mixing Northerns with Butlers will lighten or darken the colors depending on who's genes are dominating.
Yours may have some Snowflake somewhere in the genes, hard to tell from your pic.