If you’re using the default theme you can take a look around line 223 for something like this –
`a:hover {
color: #888;
text-decoration: underline;
}
a,
h2 a:hover {
color: #000;
text-decoration: none;
}`
Some areas will have their own hyperlink styles (like the homepage, nav, etc), but the code above changes the main hyperlinks for the content areas. If you need to find out different area specifically just let me know.