It's not necessary for manhwa to be colored
manga are japanese while manhwa are korean and manhua chinese
Just a difference in the name but they are the same actually
Manga is for Japanese comic.
Manhwa is Korean comic (and no, colors are for WEBTOONS)
Manhua are Chinese.
These words are basically mean comic and mostly black and white (some add color on the starter page but color doesn't count for meaning of Manga, Manhwa, Manhua) but from three different asian countries.
What is different between manga and manha???