Header text colour

Hello,

I’ve been searching the forums and some css pages and decided to ask here for help, cause even though I understand there must be a simple solution for my problem!

I’ve been trying to change the font colour of my header text with this css code:

.uku-serif .header-intro-wrap p .header-intro-text {
color : #000 !important;
}

but it seem not to be working. Does anyone have any tips on this?

Thank you!

The page I need help with: [log in to see the link]