Changing the Title font size and color

WordPress version: 4.7.1
Plugin Name and version: Easy Sign Up 3.4
I did this: Tried to change the title font
I expected the plugin to do this: Change the title font
Instead it did this: did not change the title font

Is there any way to change the title font? It is coming out small, grey, and hard to read. I tried adding style=”color: #ffffff;” to try to change color (and font and size) but nothing would change.