Change default text color in theme obsidian

Could you please, tell me how to change the main text color (white) to cupertino in dark and light theme?

The topic title says “font color” but the content mentions “cupertino” which is a font-face/font-family as far as I know.

So just to verify before anyone jumps in – do you want to change the font color or font family?

I apologize for the inconvenience. I mean, can the color of the main obsidian font be changed by css? I have a cupertino theme, but I think it would be great if it worked everywhere.
upd. Chatgpt solved this issue.

body {
color: #F5F5DC;
}

.markdown-preview-view,
.markdown-source-view {
color: #F5F5DC;
}

You may want to instead change the values of the CSS variables provided by Obsidian: Colors - Developer Documentation.