How can I alter the filter box color in the Dawn theme?

[Popcorn]

Hi! Does anyone know how to change this top part to black?

Url:https://lua-wolves-crystals.myshopify.com/

Password: bahcri

[KetanKumar]

@Popcorn

yes, please add this code

1. Go to Online Store->Theme->Edit code
2. Asset->/base.css ->paste below code at the bottom of the file.

.mobile-facets__header {background: #000;}