Switch role link query parameters

At IAM > roles > ROLE_WITH_TRUST_RELATIONSHIP you can find a link for switch role that leads to web page with pre-filled fields. The link always have 2 query parameters and looks like this: https://signin.aws.amazon.com/switchrole?roleName=SOME_ROLE_NAME&account=ACCOUNT_ID. So the person following the link should choose display name and color themself. I've found that display name can also be set by adding parameter to query: https://signin.aws.amazon.com/switchrole?roleName=SOME_ROLE_NAME&account=ACCOUNT_ID&displayName=admin This behavior is not documented, so I'm wondering how to also set color using the query. &color=Red makes field empty, which means "color" is correct name, but I have no idea what are correct values. If someone have documentation for this behavior or managed to guess it - please let me know.