part-1
use devtools to select elements,
(modify the code of the window in the lower right corner, you can see that the selected elements will change,
Devtools click on the bold font (word), which you’ll see in the lower right corner
b, strong {
font-weight: bolder
}
you can writing something to it ,just like this
b, strong {
font-weight: bolder
color: #045591
}
You will see the font of the left window change to the corresponding color,
It’s a simple example, but others things that can be done like this.
enter this code into the custom.css ,it is saved and work,
But other people have written themes that have done most of the code, and if you just want to adjust the color, you just need to modify the color, (you can check their code to make adjustments,)
(if you need ,solarized-theme is great , you can from it )
part-2
click others logseq-theme ,open custom.css
ctrl+f search elements that you need,
just like link
tags
(name you can get from devtools ,)