can't get font color to change on sidebar

I can’t seem to get the font color to change on my sidebar, and as it is, you can’t read it because the dark colors (some black and some dark red) don’t show up well on the dark background. the site is https://www.sentfromsanta.com

The part under the meta section (which I can’t seem to get rid of, it’s in an encoded part of the theme that won’t uncode in those decoding programs for some reason), that part was white to begin with, oddly. And somehow I managed to get one line to turn white under another heading (updates from santa’s workshop). But I can’t get the writing under the shopping cart to change and I cannot get any of the headings to change. And the shopping cart is absolutely unreadable as is.

I’d also love to know how to get them un-underlined. Not sure why the meta part isn’t underlined, but that’s how I’d love the rest as well.

Please if anyone can help I’d truly appreciate it. I’ve been playing with it for a week now and am driving myself nuts.

Thank you!
Jen