Most other types of dedicated neckwear also count, like a bowtie, neckerchief, or ascot. Scarves and such do not count.

Will resolve to the best-fit color if multiple options are available, and to the first added if duplicate. If it's an abstract design or otherwise has multiple noticeable colors at a distance, it will resolve to the predominant color if it can be easily determined. If no color is so clearly predominant, it may resolve to a split.

Next POTUS = next new president after Trump leaves office.

I added some basic colors, you're welcome to get more specific or fill any gaps by adding unique answers. Answers added after the answer is known are disqualified (I will try to close answer adding early to avoid any issues with that).