Fix Info Text Color Contrast Issue

Description

Our info text color does not have sufficient color contrast to meet WCAG AA standards when used for normal sized text on a white background (i.e. background.light), which is our typical use-case for this color. We want to make this color dark enough to meet WCAG AA standards for sufficient color contrast on a white background.

To Reproduce

1. Go to the Course Planner site
2. Select inspect while highlighting any text functioning as a link, such as the Courses tab (alternately, directly find this within an anchor tag in the inspector)
3. Check the color under the styles pane, prior to any changes it is rgb(78, 136, 199) or #4E88C7
4. Check this value as the foreground option against background #FFFFFF in a color contrast checker such as WebAim - it fails at normal text size.

Expected Behavior

The color for this text needs to pass WCAG AA standards for color contrast against a white background.

Screenshots