It can be hard to figure out the harder springs from the soft ones from the way they are labeled, so I made this chart.

Long black 2.92 lbs
Short black 2.58 lbs
Orange 2.45 lbs
Blue 2.25 lbs
Silver 2.10 lbs
Yellow 1.85 lbs
Red 1.50 lbs

This is the amount of weight it took to fully compress the spring. Not sure that's how springs are rated, but that's how I got these numbers.