Any manga/manhwa where the main character has dark or tanned skin? It doesn't matter what ...

Me and the devil blues

Here are some non romance:
https://www.mangago.me/read-manga/lost_lad_london/
https://www.mangago.me/read-manga/ryuu_no_nanakuni_to_minashigo_no_juana/
https://www.mangago.me/read-manga/me_and_the_devil_blues/
^Dropped by the author so wouldn't really recommend
https://www.mangago.me/read-manga/blaster_knuckle/
https://www.mangago.me/read-manga/21st_century_knights/
https://www.mangago.me/read-manga/last_order_hitori_bocchi_no_hyakunen_sensou/
And this one is sort of a romance, so if you're not into that then ignore. Nothing ecchi though:
https://www.mangago.me/read-manga/alien_idol/

Here are some Yaoi

https://www.mangago.me/read-manga/eyes_clouded_by_the_tiger/
- historical

https://www.mangago.me/read-manga/smyrna_capri/
- omegaverse, mpreg

https://www.mangago.me/read-manga/dear_door/
- supernatural

https://www.mangago.me/read-manga/spinel_baekji/
- slave x master

https://www.mangago.me/read-manga/private_scandal/
- hotel mngr x model

https://www.mangago.me/read-manga/raion_gotoki_no_kuni_kara/
- exchange student

https://www.mangago.me/read-manga/mother_s_spirit/
- exchange student

https://www.mangago.me/read-manga/sahara_no_kuro_washi/
https://www.mangago.me/read-manga/black_eagle_in_the_sahara_alkil_s_story/
https://www.mangago.me/read-manga/sahara_no_sekiganrou/
- desert, sahara

https://www.mangago.me/read-manga/okusama_ha_alpha/
- omegaverse

https://www.mangago.me/read-manga/ookami_kun_wa_kowakunai/
- animal characteristics

https://www.mangago.me/read-manga/remnant_kemonohito_omegaverse/
- omegaverse

https://www.mangago.me/read-manga/kouguu_no_omega/
- omegaverse

https://www.mangago.me/read-manga/tokyo_m_mesu_hard_boiled/
- hitman x hitman