How to categorize expense, income, assets in a expense tracker notebook, excel sheet? Colour Coded

Hi, I'm looking to clean up my expense log, notebook by colour coding whatever expense I made, income generate (daily weekly, monthly, yearly savings, etc), assest bought (Gold, Sliver, stocks, etc). However, I don't want to complicate things by having a lot of categories. So looking for advice and suggestion on what maion categories I can/should use for each colour code for expenses, income, assets, etc.

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E.g. Set of 6 colour (Green, Blue, Purple, Pink, Orange, Yellow)

or Set of 8 colour (Green, Light Blue, Orange, Pink, Purple, Red, Turquoise, Yellow)

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For Categories, is this sufficient;

1. Needs Expense
2. Wants Expense
3. Income Generated (Savings)
4. Assets Expense (Gold, Sliver, Etc)
5. Unexpected Expense
6. etc.

What other main categories do you think I shall on consider?