Farmers, this is one of those simple solutions that'll save you so much frustration.
These Outback Wrap hydraulic hose markers color-code your tractor and equipment hoses so you're not guessing which hose goes where when connecting implements.

The Power Beyond pack comes with six colored wraps: pink for brake, orange for tank, white for load sense, red for case drain, and yellow for power beyond pressure and return.

They fit hoses from 1/4 inch up to 1-1/2 inches, and the color is molded right into the polyethylene material so it won't fade or rub off.

Temperature range from -60°F to 212°F means they handle whatever weather you throw at them, and they're not affected by grease, oil, or dirt - just wipe them clean.

No tools needed to install or move them, and they won't get brittle and crack like other identification methods.

Seriously, if you spend more than five minutes trying to figure out hydraulic connections, these wraps pay for themselves in time and frustration saved.
Worksafe Organization actually recommends them for improving farm safety - that's how good they are.