How you feel abt gray and black?
https://www.mangago.zone/read-manga/love_sick_dog/
https://www.mangago.zone/read-manga/koboreru_ambivalence/
https://www.mangago.zone/read-manga/don_t_cry_sunbae/
https://www.mangago.zone/read-manga/koi_wo_suru_tsumori_wa_nakatta/
or maybe red and gray?
https://www.mangago.zone/read-manga/ore_sama_na_doukyuusei_no_kenzoku_ni_narimashita/
or red and brown?
https://www.mangago.zone/read-manga/woof_wolf/
red and blonde?
https://www.mangago.zone/read-manga/fill_in_color/
https://www.mangago.zone/read-manga/therapy_game/
One half of the couple does have black hair, though:
red and black hair.
https://www.mangago.zone/read-manga/love_in_orbit/
https://www.mangago.zone/read-manga/tied_up_in_twins/
brown hair and black hair.
https://www.mangago.zone/read-manga/the_beast_must_die/
https://www.mangago.zone/read-manga/the_art_of_taming_a_tiger/
These are manga so it may not really matter, but on their color spreads it shows their actual hair colors:
https://www.mangago.zone/read-manga/sweet_pain/
https://www.mangago.zone/read-manga/momento_scarlet/
https://www.mangago.zone/read-manga/mobius_strip/
Thank you guys (づ￣ ³￣)づ
Need some bl with the main couples hair not being black and blonde I just noticed half of my read have them black and blonde combo and its disturbing the hell outta me (⊙…⊙ )