GetSystemColor
rgb_color GetSystemColor(color_which, bool darkVariant);
, BPrivate::GetSystemColor(fromDefaults[i], isDark));
BPrivate::GetSystemColor(B_WINDOW_TEXT_COLOR, isDark));
BPrivate::GetSystemColor(B_TOOL_TIP_TEXT_COLOR, isDark));
hsl_color success = hsl_color::from_rgb(BPrivate::GetSystemColor(B_SUCCESS_COLOR, isDark));
hsl_color failure = hsl_color::from_rgb(BPrivate::GetSystemColor(B_FAILURE_COLOR, isDark));