Displaying an arrow could enhance this. Placing links together as a menu along the top or down the left side also helps identify them as links. Not only can most color-blind people see black and white accurately, but they see all shades of yellow and blue. Most color-blind people can even see dimmer shades of yellow like gold and olive, for example. Another trick is to keep colors bright.
Bright colors are the easiest to tell apart.
This is especially useful for those with a color weakness. They can see all the colors, but it's hard to tell them apart. By placing colors against an appropriate background, you can make even less-safe colors visible. You can use red against white, green against black, turquoise against black, and magenta against blackalthough magenta does tend to appear lighter than it does for people who are not color-blind. Also remember that even when using these colors against these backgrounds, something other than color should be used as an additional cue.