Blend Theme - Personalize Main Menu Font Color

Good afternoon. I want to know how to change the font color in the main menu, displayed at the top of my website. I've looked for a while but couldn't find anything. I want it to be black/dark grey, changin to blue when the mouse is on top.

Website: www.diegogrispo.com

Thanks,
Gabriel

Good afternoon. It's been almost two months and I have not received a response. Please, reply.

New site: www.wodorbis.com

Thanks,
Gabriel