ML in Korean manhwas Black hair and blue/red eyes Silver hair and blue eyes Blonde and r...

Medium brown hair/ green eyes
Dark brown hair/ yellow with a red ring on the outside eyes
Black hair/ purple eyes
Black hair/ silver and red heterochromia
Silver hair/ purple eyes
Those are all I can think of at the moment of different (although I've only seen them in individual manhua) combinations. Two are or have smut in them lol, cuss of course the different combos are nsfw.

Oh and black hair/grey blue eyes
And black hair/ black eyes that can slowly turn grey as the ml ages

And the one with black hair always had same short haircut with bangs on one side

The FL:

Pink blond or back haired, very rare brunette girl

Thats all

ml:
white/silver hair and red eyes
blonde and green eyes

fl:
red hair and green eyes
brunette and green eyes

also fl:
pink hair and yellow/gold eyes (i dislike this combo lol)

Its seems like I have diploma and you have PhD in shojo manhwa lol

Add Purple haired fl

Not really. Those are super rare examples. You're spot on about the most commonly used features in manhwa ml's. I only really remember those ml's because their look combos are so insanely rare. Now if you're talking male MC's in a not necessarily romance genre then I have a few more examples, but even then 99.9% have the same color combos that both of us have listed. I also remembered a black hair/silver eyes, but thats about all I can remember within the romance genre.

And some ml also have pure white hair
Like mostly second male lead who is mage lol

Red hair and yellow eyes, black hair and purple eyes

Black hair and purple eye?
Which manhwa

Idk if SideKick is talking about this same one, but theres a manhwa called marriage and sword on here with a tan ml that has black hair and purple eyes. Theres some smut in it, but the primary focus is on both the ml and Fl being total unbeatable powerhouses in a fight and on the battlefield. The art isn't really all high def and sparkles, but its very consistent, and I personally think the story is really good.

Oh ok

How To Survive As a Villain on the Verge of Death

It's really just psychology of the colors~ Darker haired MLs feel strong and reliable, white and light haired colors give a wise or princely feeling. Brown ones are best for extras cuz it's boring and easy to forget tho there are some exceptions lol any other color for MLs imply there's something "off" about them like they are cursed, half humans or something esp the blue and red heads~ add in the interesting eye colors for foreshadowing or red herring of their "past" or bloodline.

And then there's the FLs which tho have lotsa blondes and blacks, there's still like an unusual amount of pinks, most likely to give off the feminine/delicate vibe

Totally true. Tbh until you put it into words like that I didn't really think of it. The brown hair/ green eyes ml I referred to has a puppy like attitude towards the fl, and his colors lend well to that. Before the art changed which made the characters look like children (which eww at the point the story is), the artist was still able to convey the same intensity as say a silver eye, or blue depending on the situation. Really interesting point you brought up. Thanks for your insight.

Yeeee and you def right about the puppy vibes too! They almost always the brown haired ones