Override custom colors set in app

the style sheet defined in the app "layout & colors" sets CSS as !important.

I would though like to have different colors for A/ links B/ modal header and knack logo H1.

Not being an expert, I would appreciate your input on this

I'm not sure if this will work, but you can likely use the custom Javascript area to set styles to elements there via jquery.

For example:

$("#element_id").css("display","flex");