Make completed tasks icons lose colour🙏

Please add this feature or at least the option:

For days passed with completed tasks, their icons color to change to greyed out.

For example in screenshot the circled days - which have now passed and all tasks completed- would be great if they lose their color. For a sense of completion and visual organisation to immediate see what day youre on and if any incomplete tasks missed.

This is my last gripe with the app- if you implement this i will sing your praises to the heavens🙏