feedback color indicator for invalid tags

Change-Id: I235e32587779369c139aedd1961b37d8fcad8f53
(cherry picked from commit 04ccece7299ac1e57488e5ef36af122edeec2aae)
make this a little less confusing

... and change to a friendlier red for invalid patterns.

Change-Id: I19488abd496b144439d7918dc31cfd3f5f4fef92
(cherry picked from commit 3d79d4ae3dff4305fa0808c34d3fb14bc0fe1e82)