To change the H1 Heading color, click at beginning of the H1 Heading text and go to the right-hand column and click on Text Color. You can use the standard colors if you wish, but I prefer to choose my choice of hex colors

You can choose the color by clicking on the last multi-colored circle in the group and placing your pointer on the small circle on the color palette and moving it around. If you know the hex color you want just enter it in the box and you should see this:

For illustration purposes I used hex #352ece for the text color. If you want a text background color, choose a different or lighter color from the text on the color palette. If you use the color palette, make a note of the hex color codes, you’ll need them every time you create a heading.

That's the H1 Heading formatted, now let's do some Paragraph formatting.