You can use an effect arrow as a paint brush with paint. : r/Minecraft
1.5.2][Forge] Magic Paintbrush Mod 1.0.0 - The world is your canvas! - Minecraft Mods - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Paintbrush Mod 1.8.9/1.7.10 - Paint scraper - File-Minecraft.com