Change underline to shade background

[benbrastmckie]

Currently gruvbox highlights all similar words that my cursor is hovering over, where other themes don't do this out of the box. This is great, but what I'd like instead of underlining is that the background of the word be highlighted, or the word itself be emboldened. I've been poking around but am struggling to figure out how to customise gruvbox to give me this result. Any pointers or other cool modifications would be greatly appreciated!

[benbrastmckie]

Figured it out... By using vim-illuminate, adding the following to my config does the trick:

vim.cmd('hi IlluminatedWordText guibg=#504945 gui=bold')