>>510645172
No, they will continue to have a90%chance of black hair and brown or black eyes for multiple generations even with continued remixing with whites. The double recessive nature is the result of two slightly related groups each with recessive traits breeding with each other for thousands of years, their own recessive traits that each group brought is in samples from over 10,000 years ago meaning it too ka while to cultivate those. They were also moderately compatible in mixing with each other as neither descended from African or neanderthaal lines. A first gen hapa will always have black hair and brown eyes, and always will if the 1st gen does not immediately rebreed again with a white person. The descending mixed hapalets will also never have genotypical double recessive traits ever, period. They will at best display phenotypical traits that will not pass on to their hapalets.

TL:DR - All 1st gen hapas (asian+white or nigger+white breeding) will have black hair and brown eyes, and all will lose the double recessive genotype (their kids won't be guaranteed to have recessive traits, in fact most never do).