Fix wrong material color for period. Now it is visible in M3 or custo…

[yogaboyCZ]

…m colors implementation

Description

Please include a summary of the change and reference any bug or feature request this will close.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update/fix

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit and screenshot tests pass locally with my changes