I want the number and title of document section to be a different color on the page, but remain black in the TOC - Is there a way to do this?

I’m creating a word document where the title on each page will be the heading which is pulled into the TOC (1. Terms and conditions, 2. Business history, etc.). I want the number and title of each section to be a different color on the page, but remain black in the TOC – Is there a way to do this?

When I try to update the Heading/title color to the color theme of the section, it looks fine. But when I update the TOC, all of the numbers of the sections change color both on the page and on the TOC.
Example;

1. Terms and Conditions – we want it in green
2. Business History – we want it in blue
3. Financials – We want it in yellow

When i update the TOC, all the numbers become green and the text remains the colour of the section (blue, yellow, etc.)