Open the About Blurb Widget (dashAboutBlurb) to enter the very brief blurb.

Setting $Border and $BorderColor here will determine the border width and color of your About and Categories sidebars, and setting the $Color determines the background color of those sidebars.

$NameColor sets the titles of the sidebars—i.e., About and Categories.

$MapBodyTextColor sets the color the the text in the sidebars.

But the most important text, as you may have noted, is actually link text. You can set these here as well. $LinkColor sets the color of links; $LinkHoverColor, the color of the link when hovered-over.