Hover style for right sidebar avatars has wrong border color

Summary

The avatars in the right sidebar seem to use the wrong hover border-color.

Example Project

-> This issue on the right sidebar.

What is the current bug behavior?

Hover color is rgba(245, 245, 245, 0.2)

What is the expected correct behavior?

Hover color should be something like rgb(220,220,200)

Relevant screenshots

Normal	Hover	Explanation
		(assignee icon) The normal color of the border is #F5F5F5, hover color: rgba(245,245,245,0.2)
		(project icon) The normal color of the border is #F5F5F5, hover color: #DCDCDC

Possible fixes

1. Within .right-sidebar a:not(.btn-retry):hover .avatar: border-color: rgba(245,245,245,0.2) -> $avatar-border-hover
2. Additionally within .avatar &:not([href]):hover: border-color: darken($avatar-border, 10%) -> $avatar-border-hover