Block/Item/Particle Color Procedure Block, a colorful feature idea.

I'm surprised with how extensive these features are that there isn't already a way to have items or blocks or particles have a tint applied. Similar to Foliage and Water textures

For example someone may want to make a sword that changes color based on the time of day, or someone else wants a block that changes to a random color when right clicked, there should be a procedure block for color tinting and one for the RGB & HEX values of a color (or you could just use number blocks for simplicity).

Although small, this feature can make a huge change in quality from mods made with this program, and help mod devs decrease the file size of rainbow items thanks to no-longer needing a frame of animation for every hue they want an item to shift. I'm sure the many people who made the average "rainbow items mod" would love this feature.