Gold is basically what makes a hen or rooster brown or white (not the kind of white that replaces black) Think of Gold Duckwing (black breasted red, rather) versus Silver Duckwing. That's gold genes vs silver genes at play there. Same goes with Partridge vs Penciled, Light Columbian vs Buff Columbian. Your black w/red leakage carries gold. The black w/white leakage carries silver. Offspring with color other than black or lavender have leakage, yes. Lavenders with color other than Lavender have leakage, yes, however if the leakage is silver instead of gold you might not notice it. If the leakage is gold it will show up as a dirty yellowish color.