Change marker colors for specific crops
Access the configuration file
The mod stores its settings in a configuration file located in your .minecraft/config folder. Look for the Full Grown Crop Marker config file (usually a .toml or .json file depending on mod version).
Customize individual crop colors
Open the config file with a text editor. You'll find entries for each crop type (wheat, carrots, potatoes, beetroots, nether wart, and any modded crops). Each crop has an associated color setting.
Change the color value to one of the available options: green, red, blue, yellow, orange, or purple. For example, if you want wheat markers to be blue instead of yellow, locate the wheat entry and change its color parameter accordingly.
Apply changes
Save the config file and reload your world or restart the game. The markers above fully grown crops will now display in your chosen colors. If you're in a running world, you may need to move away from and back to your crops for the visual update to take effect.