A diagram showing two root channels, #zed and #rust-analyzer, and Mikayla's membership in each channel: In #zed Mikayla is a member. Since Rust Analyzer and Zed co-administrate a channel, and I have an Admin role in #rust-analyzer , these rules allow my role to be upgraded to Admin in just #zed-rust-analyzer . pub struct ThemeColors { pub base : Range < Hsla >, pub surface : Range < Hsla >, pub overlay : Range < Hsla >, pub muted : Range < Hsla >, pub subtle : Range < Hsla >, pub text : Range < Hsla >, pub highlight_low : Range < Hsla >, pub highlight_med : Range < Hsla >, pub highlight_high : Range < Hsla >, pub success : Range < Hsla >, pub warning : Range < Hsla >, pub error : Range < Hsla >, pub inserted : Range < Hsla >, pub deleted : Range < Hsla >, pub modified : Range < Hsla >, }