How to change h2 style with CSS

Hi,

I’d like to ask you how I can change H2, H3, H4 style with CSS code settings.
I have changed from my previous theme which I have set as below CSS code:

.entry-content h2{
color:#243042;
padding: .8em 0 .8em .8em;
}

.entry-content h4{
padding: .3em 0 .3em .8em;
background: #e8e8e8;
}

However, this is not working in this theme.

Could you please tell me which CSS code can work?

Or I’d like to change like:

h1 {
background: #c2edff;/
padding: 0.5em;/
}

Thank you.

Oh, sorry. It is working.
I don’t know why it wasn’t working before!!

No need to reply!