Can't block specifically for DDG image search

[brianadragon]

I'm trying to block YouTube only from image searches in DuckDuckGo in Chrome. I've tried:
$category = "images" & host = "youtube.com"
$site="duckduckgo" & host="youtube.com"
://.youtube.com/* @if($category="images")
None of these work. documentation and examples are pretty lacking, so I could be doing it wrong, or it could be not working. I'd appreciate some help. (This could really benefit from having a dedicated subreddit.)

[brianadragon]

It turns out that
://.youtube.com/* @if($category="images")
works, the problem was that it won't let me highlight and block at the same time. How can I make it do both? When I unhide results I want to have them color coded so I can know at a glance what I'm looking for.

[iorate]

host of YouTube is typically www.youtube.com, not youtube.com.

$category = "images" & host = "www.youtube.com"
# or
$category = "images" & host $= ".youtube.com"
# or
*://*.youtube.com/* @if($category = "images")

To block YouTube on image search and highlight it on other searches,

*://*.youtube.com/*
@1 *://*.youtube.com/* @if(! $category = "images")

[brianadragon]

That highlights it in other searches, but it's all one color when blocked on the images page. Is it not possible to have some blocked items the default color and some the specified color?