How can I modify the color scheme of my webpage?

[nondualreality]

I ended up writing some simple code with the help of GPT and it worked out

{
background-color: #ffffff;
color: #4cb2ba;
margin-left: 5%;
margin-right: 5%;
}
h3 {
color: #4cb2ba;
}
h1 {
color: #4cb2ba;
font-size:35px;
}