The basic scarf recommends that you choose the color according to your own clothes. Black, white, gray, beige, camel, wine red, and blue are relatively versatile scarves.
In addition to solid colors,large plaids (small plaids,not recommended), stripes, and some atmospheric patterns are good choices.
My own winter coats are mainly camel, gray, black and navy, so I often use a beige collar, a gray collar and a burgundy collar. Usually it is:
Beige + camel / gray / black coat:
Wine red + black / navy blue coat;
Gray + black / gray / navy blue coat.