The sentence

The beautifully highlighted word caught her eye.

works well. Now I want to say the same thing but instead of expressing that the highlighting was beautiful, I want to point out that it was red. However, to my (non-native) English mind, both "redly" and

The red highlighted word caught her eye.

just sound wrong.

Is there a word I can place in this sentence to say that the highlighting is red?

(I know that I could resort to completely different constructions like "The word highlighted in red" but that's not what this question is about.)