Edrawsvg is using the w3-theme-blue-grey W3.CSS color theme.
To change it, select a color theme.
Then replace stylesheet import in
edrawsvg.html
file:
<link type="text/css" rel="stylesheet" href="drwapp/w3-theme-blue-grey.css"/>
By the selected color theme, for example:
<link rel="stylesheet" href="https://www.w3schools.com/lib/w3-theme-deep-orange.css"/>
The
edrawsvg.html
file can copied to do this changes.