Matthias Krüger 955bba36ea
Rollup merge of #112133 - GuillaumeGomez:migrate-gui-test-color-10, r=notriddle
Migrate GUI colors test to original CSS color format

Follow-up of https://github.com/rust-lang/rust/pull/111459.

r? ```@notriddle```
2023-06-01 22:47:31 +02:00
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