The requested application color scheme.
The effective appearance will be decided based on the application color
scheme and the system preferred color scheme. The
HdyStyleManager:dark property can be used to query the current
HDY_COLOR_SCHEME_PREFER_LIGHT color scheme results in the application
using light appearance unless the system prefers dark colors. This is the
HDY_COLOR_SCHEME_PREFER_DARK color scheme results in the application
using dark appearance, but can still switch to the light appearance if the
system can prefers it, for example, when the high contrast preference is enabled.
ignore the system preference entirely, they are useful if the application
wants to match its UI to its content or to provide a separate color scheme switcher.
If a per-
GdkDisplay style manager has its color scheme set to
HDY_COLOR_SCHEME_DEFAULT, it will inherit the color scheme from the
default style manager.
For the default style manager,
HDY_COLOR_SCHEME_DEFAULT is equivalent to
HdyStyleManager:system-supports-color-schemes property can be
used to check if the current environment provides a color scheme preference.