Is it possible to tweak the css so that ‘likes’ show up more prominently on the page? When I scan a Github issue it’s easy to see which comments have been ‘liked’ because the reaction icons are in a bright color. By contrast, on discourse the ‘like’ count is the same pale grey as all of the action links at the bottom of every comment. A comment with zero likes looks pretty much the same as a comment with 20 likes.
Is it easy to change this in the discourse css?
It should be possible to add custom CSS at /admin/customize/css_html, for example:
.post-controls button.has-like { color: #f92600 !important; }
produces vibrant heart:
Tried adding that but matches nothing. Seems there is no elements with .has-like, at least what I can see in Firefox…
I think .has-like is set if you yourself liked it.
This might work
.post-controls button.like-count {
color: #f92600;
}
colour might need a change.
I see 
below the first post in this topic, so either you fixed it, or it took some time for browser to load updated CSS.
Either way 