You can do the reverse to find the value of a Hex number. I'll go through changing the body colours here, and the rest in their relevant sections. Remember if you've set an image as the background, this colour will be behind the picture, so the viewer can't see it. However, it's wise to specify a colour opposite to your text anyway, in case the viewers turns off images. On this page it's white.
TEXT is pretty obviously the colour of the text on the page.
On this page it's black. LINK is the colour of links, these are the words you click on to take you to another page, such as this one for the resources page. On this page it's dark blue. On this page it's a kind of cyan. On this page it's red.