a little proof-of-concept.
- UISettings.GetColorValue
- RGBA is
0-255
- c.f. https://stackoverflow.com/questions/63159666/get-windows-10-theme-color-in-classic-c-winapi-win32-application
- controlAccentColor
- rgba is
0.0-1.0
- c.f. MacAccentColorCatalyst
controlAccentColor
is only available on macOS 10.14 or newer- 4D SVG rendering engine does not seem to accept
hsl(0, 100%, 50%)
style color. - the valid sytax of the
picture
property is url("{posix}")