Want to use multiple colours for links

Hi, so when I use the WPtouch plugin, there is an option to change the link colours for the customize theme menu. But the problem is that the colours of my links are multiple colours, and if I change the link, it clashes with the appearance of the website. For example, My buttons are purple with white text font. And I want to use links that are coloured purple, but doing so makes the font on my button not visible. I want to have both purple and white link colours on mobile.

What CSS Code can I use that can allow me to use multiple link colours?

Thanks.