For some reason the icon for Kontact, - of the envelopes and notes pinned together with a paper clip doesn't feel right for me, it's difficult to focus on (i'm not entirely sure why, whether it's being visually impaired or just the very light color scheme it uses). While I can change the shortcut icon for Kontact, when it appears in the taskbar, - it still have that original icon of the pinned-together envelopes.

Is there a way I can change this too?

Thankyou for any help you can provide