looks like the Apple Watch buttons.
Control Center buttons such as CCSettings, FlipControlCenter and Polus. In
addition to that, it also works with multitasking tweaks like Auxo and Seng.
tweak, you can have options to configure in the tweak preferences from the
settings app where you can enable or disable the tweak. You can use custom
color for which currently support for FlipControlCenter and Polus.
iOS 9.1, PanGu has released the Jailbreak for iOS 9.1.
then follow this simple steps on How to jailbreak iOS 9, 9.0.2 and 9.1
jailbreak is not yet released.