fix sass warning

migrate
3 │ @import "core/colors";
│ ^^^^^^^^^^^^^
╵

Start by locating the stylesheet that contains the reported @import "core/colors" line and identify the Sass command or build entry point that emits the warning. The issue does not name a file, test, or expected final output, so confirm the intended migration and verify that the warning no longer appears when the site styles are built.

Written by the indexing model from the issue text.