Steps to reproduce (assumes ChromeVox or similar)

1. Open https://elastic.github.io/eui/#/forms/color-picker in a new tab.
2. Try to tab to the color picker element itself

Actual Result

Keyboard Navigation skips the color picker

Expected Result

Color Picker element should be accessible via keyboard

Category: #789: Elastic UI Color Picker Accessibility
Relevant WCAG Criteria: 2.1.1 Keyboard