Basic Code Help Please

h2 { color: #D21616; }

https://www.w3schools.com/cssref/pr_text_color.asp

however, the title might be styled by other more specific styles in your theme; therefore posting a link to your site might help.

try using a browser inspection tool such as Firebug to find out which style of your theme is responsible for formatting the h2 tag.

also, as you are dealing with a pure formatting problem, better ask at a css forum like https://csscreator.com/forum