Dawn Theme: Change button color. And Change button text color

[heemfit]

Site: Heemfit.com

How do I change the button text color to white #FFFFFF ? 

How do I change the button color to blue #31C4FA?

[suyash1]

@heemfit- please addd this given css to the very end of base.css file and check, should look like screenshot below

#Banner-template--15113647390882__image_banner .button--primary {
    background-color: #31C4FA;
    color: #fff;
}