Wrong circle crop border default color

[wchaws]

Describe the bug

example.jpg?x-oss-process=image/circle,r_100

To Reproduce

Expected behavior

Please complete the following information about the solution:

• Version: [e.g. v1.0.0]
• Region: [e.g. us-east-1]
• Was the solution modified from the version published on this repository?
• If the answer to the previous question was yes, are the changes available on GitHub?
• Have you checked your service quotas for the sevices this solution uses?
• Were there any errors in the CloudWatch Logs?

Screenshots

Additional context