It helps to know a tiny bit of HTML.
But don’t worry — it’s just a little.
Click the gear icon to bring up your Gmail settings.
Here’s where the HTML comes in handy. If you need to, just use this template to build your own.
Location of my logo image
Desired color in Hex values
I don’t want underlines on my links
Save the HTML file and open it in a web browser.
Copy it as is.
Paste into the Signature box in your Gmail settings and you’re good to go (Test first, though).