Theme Buttons and Textcolor

I have with button styles in Enfold -> Styles the trouble, that if I use a preset style color scheme like “splash blue”, which generates nice darker blue buttons, the text in the buttons are near black which is hard to read. I switches over to the color scheme “cyan” and have now white text, which reads much better. But the button color is for me a bit to light, so I changed the color by hand to a darker blue. But now a kind of automatic is in action and outputs the button text as a kind of black.

How do I get a darker blue in buttons and links but with white text in buttons?