Launch Coloured Tooltips Mod 1.18.2/1.16.5/1.12.2 and you can edit any default color of the tooltips in the game for free. Remember to visit the configuration file!

How Coloured Tooltips works
It allows the users to change the initial color of the tooltips in Minecraft. You can complete your job by configuring the config file in config/colouredtooltips.cfg on 1.12.2. Don’t skip to do the same in config/colouredtooltips-client.toml in 1.13+!
Notes!
The color format that the product deploys is an ARGB hex string. This is similar to the normal RGB hex strings.
However, there are 2 additional characters at the start that manage the transparency.
If you did not acquaint with hex colors, you can choose an online color picker to select anything you love.
The cosmetic Coloured Tooltips mod can make the outer layer of all tooltips different. They should be the description that uses Forge’s tooltip rendering code. Install Minecraft Forge to begin!