How to change color of SharePoint top bar?

[Lance Alcabasa]

I can't seem to find the option to change the color of the blue SharePoint bar as in the image below:

Where can I find the option to change the color?

[#2]

There is not option to change directly the color of that bar in SPO, you have to do it through the Office 365 customization options

[#3]

@Juan Carlos González MartínIs this through powershell? Or is available through UI?