[VarDumper] symfony.com color scheme on the CLI
minor #12385 [VarDumper] symfony.com color scheme on the CLI (nicolas-grekas)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[VarDumper] symfony.com color scheme on the CLI

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12355, #12391
| License       | MIT
| Doc PR        | -

Commits
-------

d5620bf [VarDumper] symfony.com color scheme on the CLI