Use `palette` and `Color` from top level Xilem and Masonry #2478

Job	Run time
cargo check (aarch64-android)	21s
cargo check (msrv) (windows-latest)	2m 0s
cargo check (msrv) (wasm32)	17s
cargo check (msrv) (macos-latest)	32s
cargo clippy (wasm32)	1m 57s
cargo check (msrv) (ubuntu-latest)	42s
cargo doc	41s
cargo clippy (windows-latest)	5m 7s
cargo clippy (macos-latest)	2m 41s
formatting	31s
cargo clippy (ubuntu-latest)	3m 21s
Prime LFS Cache	4s
cargo test (wasm32)	21s
typos	7s
cargo test (windows-latest)	3m 33s
cargo test (macos-latest)	1m 50s
cargo test (ubuntu-latest)	3m 21s
	27m 26s

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