Reproduction:

1. Start a brand new deployment.
2. Open appearance settings.
3. Toggle enabled and add a message. Do not touch the color.
4. Submit.

Behavior:

Nothing happens. Checking the network request reveals:

{
    "message": "parse color: expected 7 characters:\n    github.com/coder/coder/enterprise/coderd.validateHexColor\n        /home/coder/coder/enterprise/coderd/appearance.go:114"
}

After manually setting the color submitting always works. It is just that first request where we are not sending any color.

Solution:

• Surface errors
• Set default color if none yet