Functional Grease Dispenser Color Coding

I need a practical color–coding scheme for our grease dispensers that does more than look good. The palette must keep the equipment looking fresh, wipe-clean, and clearly communicate how each section should be used. My goal is to pair each color with a simple symbol so mechanics instantly understand the instructions without stopping to read text.

Please design:
• A concise color palette that resists staining and is easy to maintain.
• Matching high-contrast symbols that integrate those colors and explain the intended action or grease type at a glance.
• A visual mock-up of the dispenser showing placement of each colored symbol.

The solution should be produced in common design formats (AI or PSD for artwork, PDF or PNG for mock-ups) so our manufacturer can apply the scheme directly. I’ll review the draft palette and symbol set first, then give the go-ahead for the final artwork.